Vulnerabilities and security researches forsimply-schedule-appointments simply-schedule-appointments

Direction: ascending

Jun 07, 2024

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-22311

CVE, Research URL: CVE-2024-22311
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 27, 2024
Research Description: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in N Squared Simply Schedule Appointments allows Reflected XSS.This issue affects Simply Schedule Appointments: from n/a through 1.6.6.20.
Affected versions: max 1.6.6.24.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-4288

CVE, Research URL: CVE-2024-4288
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: May 16, 2024
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘link’ parameter in versions up to, and including, 1.6.7.14 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected versions: max 1.6.7.18.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-1760

CVE, Research URL: CVE-2024-1760
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 06, 2024
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.6.6.20. This is due to missing or incorrect nonce validation on the ssa_factory_reset() function. This makes it possible for unauthenticated attackers to reset the plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Affected versions: max 1.6.6.24.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-2342

CVE, Research URL: CVE-2024-2342
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Apr 10, 2024
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL Injection via the customer_id parameter in all versions up to, and including, 1.6.7.7 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with contributor access or higher, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Affected versions: max 1.6.7.9.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-2341

CVE, Research URL: CVE-2024-2341
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Apr 10, 2024
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL Injection via the keys parameter in all versions up to, and including, 1.6.7.7 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with subscriber access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Affected versions: max 1.6.7.9.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2022-2374

CVE, Research URL: CVE-2022-2374
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Aug 29, 2022
Research Description: The Simply Schedule Appointments WordPress plugin before 1.5.7.7 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
Affected versions: max 1.5.7.7.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2022-2373

CVE, Research URL: CVE-2022-2373
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Aug 29, 2022
Research Description: The Simply Schedule Appointments WordPress plugin before 1.5.7.7 is missing authorisation in a REST endpoint, allowing unauthenticated users to retrieve WordPress users details such as name and email address
Affected versions: max 1.5.7.7.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2023-50851

CVE, Research URL: CVE-2023-50851
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Dec 28, 2023
Research Description: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in N Squared Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin.This issue affects Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin: from n/a before 1.6.6.1.
Affected versions: max 1.6.6.1.
Status: vulnerable

Sep 15, 2024

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-7129

CVE, Research URL: CVE-2024-7129
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Sep 13, 2024
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.43 does not escape template syntax provided via user input, leading to Twig Template Injection which further exploited can result to remote code Execution by high privilege such as admins
Affected versions: max 1.6.7.43.
Status: vulnerable

Oct 17, 2024

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-7877

CVE, Research URL: CVE-2024-7877
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Nov 05, 2024
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.55 does not sanitise and escape some of its Notification settings, which could allow high privilege users such as admin to perform Cross-Site Scripting attacks even when unfiltered_html is disallowed
Affected versions: max 1.6.7.55.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-7876

CVE, Research URL: CVE-2024-7876
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Nov 05, 2024
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.55 does not sanitise and escape some of its Appointment Type settings, which could allow high privilege users such as admin to perform Cross-Site Scripting attacks even when unfiltered_html is disallowed
Affected versions: max 1.6.7.55.
Status: vulnerable

Mar 08, 2025

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2024-13431

CVE, Research URL: CVE-2024-13431
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 07, 2025
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the accent_color and background parameter in all versions up to, and including, 1.6.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Affected versions: max 1.6.8.5.
Status: vulnerable

Mar 14, 2025

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2025-1119

CVE, Research URL: CVE-2025-1119
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 13, 2025
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 1.6.8.5. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.
Affected versions: max 1.6.8.7.
Status: vulnerable

Jun 15, 2025

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2025-4667

CVE, Research URL: CVE-2025-4667
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Jun 14, 2025
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's ssa_admin_upcoming_appointments, ssa_admin_upcoming_appointments, and ssa_past_appointments shortcodes in all versions up to, and including, 1.6.8.30 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected versions: max 1.6.8.32.
Status: vulnerable

Jan 10, 2026

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2025-13754

CVE, Research URL: CVE-2025-13754
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Dec 19, 2025
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.16. This is due to the plugin exposing its admin embed endpoint at `/wp-json/ssa/v1/embed-inner-admin` without authentication, which leaks plugin settings including staff names, business names, and configuration data that are not publicly displayed on the booking form. This makes it possible for unauthenticated attackers to extract private business configuration. In premium versions with integrations configured, this might also expose other sensitive data including API keys for external services.
Affected versions: max 1.6.9.17.
Status: vulnerable

Jan 28, 2026

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2025-12166

CVE, Research URL: CVE-2025-12166
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Jan 15, 2026
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the `order` and `append_where_sql` parameters in all versions up to, and including, 1.6.9.9 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Affected versions: max 1.6.9.13.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2025-69315

CVE, Research URL: CVE-2025-69315
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Jan 22, 2026
Research Description: Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.9.15.
Affected versions: max 1.6.9.15.
Status: vulnerable

Apr 13, 2026

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-3658

CVE, Research URL: CVE-2026-3658
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 19, 2026
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to SQL Injection via the 'fields' parameter in all versions up to, and including, 1.6.10.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database, including usernames, email addresses, and password hashes.
Affected versions: max 1.6.10.2.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-3045

CVE, Research URL: CVE-2026-3045
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 14, 2026
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access of sensitive data in all versions up to and including 1.6.9.29. This is due to two compounding weaknesses: (1) a non-user-bound `public_nonce` is exposed to unauthenticated users through the public `/wp-json/ssa/v1/embed-inner` REST endpoint, and (2) the `get_item()` method in `SSA_Settings_Api` relies on `nonce_permissions_check()` for authorization (which accepts the public nonce) but does not call `remove_unauthorized_settings_for_current_user()` to filter restricted fields. This makes it possible for unauthenticated attackers to access admin-only plugin settings including the administrator email, phone number, internal access tokens, notification configurations, and developer settings via the `/wp-json/ssa/v1/settings/{section}` endpoint. The exposure of appointment tokens also allows an attacker to modify or cancel appointments.
Affected versions: max 1.6.10.0.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-1704

CVE, Research URL: CVE-2026-1704
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 14, 2026
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.6.9.29. This is due to the `get_item_permissions_check` method granting access to users with the `ssa_manage_appointments` capability without validating staff ownership of the requested appointment. This makes it possible for authenticated attackers, with custom-level access and above (users granted the ssa_manage_appointments capability, such as Team Members), to view appointment records belonging to other staff members and access sensitive customer personally identifiable information via the appointment ID parameter.
Affected versions: max 1.6.10.0.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-39495

CVE, Research URL: CVE-2026-39495
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Apr 08, 2026
Research Description: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Blind SQL Injection.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.9.27.
Affected versions: max 1.6.9.29.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-39694

CVE, Research URL: CVE-2026-39694
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Apr 08, 2026
Research Description: Missing Authorization vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.10.2.
Affected versions: max 1.6.10.4.
Status: vulnerable

Apr 14, 2026

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-1708

CVE, Research URL: CVE-2026-1708
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: Mar 11, 2026
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection in all versions up to, and including, 1.6.9.27. This is due to the `db_where_conditions` method in the `TD_DB_Model` class failing to prevent the `append_where_sql` parameter from being passed through JSON request bodies, while only checking for its presence in the `$_REQUEST` superglobal. This makes it possible for unauthenticated attackers to append arbitrary SQL commands to queries and extract sensitive information from the database via the `append_where_sql` parameter in JSON payloads granted they have obtained a valid `public_token` that is inadvertently exposed during the booking flow.
Affected versions: max 1.6.9.29.
Status: vulnerable

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-39493

CVE, Research URL: CVE-2026-39493
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: -
Research Description: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin [simply-schedule-appointments] < 1.6.9.29 CVE-2026-39493
Affected versions: max 1.6.9.29.
Status: vulnerable

May 01, 2026

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-42384

CVE, Research URL: CVE-2026-42384
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: -
Research Description: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin [simply-schedule-appointments] < 1.6.11.2 CVE-2026-42384
Affected versions: max 1.6.11.2.
Status: vulnerable

May 07, 2026

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-4807

CVE, Research URL: CVE-2026-4807
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: May 07, 2026
Research Description: The Appointment Booking Calendar plugin for WordPress is vulnerable to Missing Authorization in versions up to and including 1.6.10.6. This is due to a flawed authorization logic in the nonce_permissions_check() method combined with the public exposure of a site-wide reusable nonce. The plugin exposes a public_nonce value through the /wp-json/ssa/v1/embed-inner endpoint, which is accessible to unauthenticated users. The appointment deletion endpoint at /wp-json/ssa/v1/appointments/{id}/delete and /wp-json/ssa/v1/appointments/bulk use a permission check that accepts requests containing both an X-WP-Nonce header (with any arbitrary value) and an X-PUBLIC-Nonce header (with the valid public nonce). When the X-WP-Nonce validation fails, the function falls back to validating the X-PUBLIC-Nonce without properly rejecting the request. Since the public_nonce is exposed to all unauthenticated visitors and is site-wide (not user-specific or appointment-specific), attackers can obtain it and use it to view details of arbitrary appointments, including the public_edit_url, or delete arbitrary appointments by ID. This makes it possible for unauthenticated attackers to view, delete or modify any appointment in the system, disclosing sensitive appointment data, causing service disruption, and loss of booking records.
Affected versions: max 1.6.11.
Status: vulnerable

May 27, 2026

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin # CVE-2026-7493

CVE, Research URL: CVE-2026-7493
Home page URL: Security reports for Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Application: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Date: May 27, 2026
Research Description: The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to denial of service in all versions up to, and including, 1.6.11.5. This is due to a publicly accessible REST API endpoint (/wp-json/ssa/v1/async) that calls PHP's sleep() function on a user-supplied delay parameter without any rate limiting. This makes it possible for unauthenticated attackers to exhaust PHP worker processes, denying access to the site to legitimate users.
Affected versions: max 1.6.11.7.
Status: vulnerable