WordPress plugins play a crucial role in extending the functionality of websites, but they also introduce potential security risks. One such vulnerability, identified as CVE-2024-4924, has been discovered in the Sassy Social Share plugin. This flaw allows attackers to execute stored cross-site scripting (XSS) attacks, leading to the creation of a backdoor for account takeover. This article explores the discovery, exploitation, and implications of CVE-2024-4924, along with strategies to enhance WordPress security.
| CVE | CVE-2024-4924 |
| Plugin | Sassy social share < 3.3.63 |
| Critical | High |
| All Time | 5 476 031 |
| Active installations | 100 000+ |
| Publicly Published | May 14, 2024 |
| Last Updated | May 14, 2024 |
| Researcher | Dmtirii Ignatyev |
| OWASP TOP-10 | A7: Cross-Site Scripting (XSS) |
| PoC | Yes |
| Exploit | No |
| Reference | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-4924 https://wpscan.com/vulnerability/1867505f-d112-4919-9fd5-01745aa0433e/ |
| Plugin Security Certification by CleanTalk |  |
| Logo of the plugin |  |
Timeline
| April 24, 2024 | Plugin testing and vulnerability detection in the Social Sharing Plugin – Sassy Social Share have been completed |
| April 24, 2024 | I contacted the author of the plugin and provided a vulnerability PoC with a description and recommendations for fixing |
| May 14, 2024 | Registered CVE-2024-4924 |
Discovery of the Vulnerability
During routine testing of the Sassy Social Share plugin, security researchers uncovered a vulnerability that enables attackers to execute stored XSS attacks. By embedding malicious scripts in specific plugin settings, attackers can inject arbitrary code into the website, potentially compromising user accounts and site integrity. The vulnerability lies in the plugin’s failure to properly sanitize user inputs, allowing attackers to bypass security measures and execute malicious code.
Understanding of Stored XSS attack’s
Stored XSS, also known as persistent XSS, occurs when malicious scripts are injected into a web application and stored in its database. These scripts are then served to users who access the affected pages, leading to the execution of the injected code in their browsers. In the context of WordPress, stored XSS vulnerabilities can have severe consequences, including account takeover, data theft, and website defacement.
Real-world examples of stored XSS in WordPress include vulnerabilities found in comment sections, contact forms, and plugin settings. Attackers exploit these vulnerabilities to inject scripts that steal user credentials, redirect users to malicious websites, or perform unauthorized actions on behalf of the victim.
Exploiting the Stored XSS Vulnerability
Exploiting CVE-2024-4924 involves manipulating specific plugin settings to inject malicious scripts. The following steps outline a proof of concept (POC) payload:
POC:
You should go to settings of the plugin. Change “Right offset” field to (123;alert(1);//) -> Save Settings (Admins and editors are allowed to use JS in posts/pages/comments/etc, so the unfiltered_html capability should be disallowed when testing for Stored XSS using such roles)
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The potential risk posed by CVE-2024-4924 is significant. Attackers can exploit this vulnerability to hijack user accounts, steal sensitive information, or perform malicious actions on the website. In a real-world scenario, an attacker could inject a script that creates a backdoor, granting them persistent access to the website even after the initial exploit is discovered and patched.
For instance, an attacker could inject a script that adds a new administrator account to the WordPress site, providing them with unauthorized access to the backend. From there, they could manipulate content, install malicious plugins, or launch further attacks against site visitors.
Recommendations for Improved Security
To mitigate the risks associated with
To mitigate the risks associated with CVE-2024-4924 and similar vulnerabilities, WordPress administrators should consider the following security measures:
- Regular Security Audits: Conduct periodic security audits of plugins and themes to identify and address potential vulnerabilities.
- Sanitize User Inputs: Implement strict input validation and sanitization measures to prevent XSS attacks.
- Role-Based Permissions: Limit the capabilities of user roles, especially those with access to sensitive settings or functionalities.
- Plugin Updates: Keep all plugins and themes updated to the latest versions to patch known vulnerabilities and enhance security.
- Security Plugins: Utilize security plugins that offer features such as XSS protection, firewall, and malware scanning to bolster site defenses.
By taking proactive measures to address Stored XSS vulnerabilities like CVE-2024-4924, WordPress website owners can enhance their security posture and safeguard against potential exploitation. Stay vigilant, stay secure.
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