Lead generation plugins are high-value targets because they sit at the intersection of front-end user interaction, dynamic content rendering, and conversion tracking. They commonly introduce new UI surfaces (popups, bars, inline optins), store campaign configuration, and integrate with external marketing services — which means weaknesses can translate into stored/reflected XSS in campaign output, CSRF-driven configuration changes, leakage of lead or account metadata, or abuse of endpoints used to render and manage campaigns. Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation version 2.16.22 has successfully completed the CleanTalk Plugin Security Certification process and received PSC-2026-64621, confirming that the plugin was reviewed from a secure code perspective with attention to the most common exploitation paths for marketing, popup, and opt-in plugins.

Name of	Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation
Version	2.16.22
Active installations	1+ million
Description	Make popups & optin forms to get more email newsletter subscribers, leads, and sales.
Security	Successfully tested for: SQL Injection (SQLi) Cross-Site Scripting (XSS) – Stored & Reflected Cross-Site Request Forgery (CSRF) Authentication Vulnerabilities Authentication Bypass Exploits Privilege Escalation Buffer Overflow Denial-of-Service (DoS) vectors Data Leakage Vulnerabilities Insecure Dependency Usage Remote Code Execution (RCE) Risks Unauthorized File Access Insufficient Injection Protection Information Disclosure via Misconfigured Endpoints
CleanTalk Certification	Proudly earned the “Plugin Security Certification” (PSC) from CleanTalk, indicating adherence to stringent security standards.
Additional Information	Site owners can deploy lead-capture campaigns with the assurance of the “Plugin Security Certification” (PSC). As a best practice, restrict who can manage campaigns and connection settings, review which roles can publish popups/optins, and keep any embedded scripts or custom HTML in campaigns limited to trusted administrators.
Plugin Security Certification by CleanTalk
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PSC by Cleantalk

Key Features

OptinMonster provides a campaign builder to create and deploy conversion-focused experiences such as popups, floating bars, slide-ins, fullscreen overlays, and inline opt-in blocks for email capture and promotional messaging. It supports workflow features that matter in real marketing operations, including template-based design, audience targeting and display rules, and integrations with popular email marketing and CRM platforms to route collected leads. It also offers measurement-oriented capabilities such as analytics and optimization patterns (e.g., segmentation and iterative improvement) that help teams validate which campaigns perform best. From a security standpoint, these features touch sensitive surfaces such as wp-admin configuration, dynamic front-end rendering, and integration/connection metadata, meaning strong access control and safe output handling are essential when campaigns can include user-controlled strings, HTML, or script-related settings.

Security Assurance

The CleanTalk Plugin Security Certification evaluation for popup and lead-capture plugins focuses on attacker models that target admin configuration integrity, front-end injection surfaces, and data exposure. Common abuse patterns include attempting to inject JavaScript into campaign content or settings that are later rendered on the site (stored XSS), forcing configuration changes via CSRF against administrators (enabling/disabling campaigns, changing display rules, modifying integrations), abusing weak role checks to let lower-privileged users publish or edit global campaigns, and probing AJAX/REST-style handlers for information disclosure (campaign identifiers, diagnostics, connection state). The review validates that sensitive actions are protected with capability checks and nonce/CSRF defenses, that any values rendered into HTML are output-encoded appropriately, and that integration-related metadata and endpoints avoid leaking sensitive information. Because these plugins influence what executes in visitor browsers, special attention is paid to preventing unsafe script injection pathways and ensuring consistent authorization boundaries across all campaign management handlers.

The plugin has been successfully tested for:

✅ Information Leakage Vulnerabilities

✅ SQL Injection Vulnerabilities

✅ Cross-Site Scripting (XSS) Attacks

✅ Cross-Site Request Forgery (CSRF) Attacks

✅ Authentication & Authentication Bypass Vulnerabilities

✅ Privilege Escalation Vulnerabilities

✅ Buffer Overflow Vulnerabilities

✅ Denial-of-Service (DoS) Vulnerabilities

✅ Data Leakage Vulnerabilities

✅ Insecure Dependencies

✅ Code Execution Vulnerabilities

✅ File Unauthorized Access Vulnerabilities

✅ Insufficient Injection Protection

Conclusion

With PSC-2026-64621, Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation version 2.16.22 demonstrates strong baseline security for the workflows that matter most in lead-capture plugins: controlled administration of campaign settings, safe front-end rendering of conversion elements, and consistent protections against common WordPress vulnerability classes that target endpoints, handlers, and stored configuration. This certification helps site owners adopt popup-based marketing workflows while reducing the risk that campaign tooling becomes an unintended attack surface. As a best practice, restrict campaign editing to trusted administrators, review role permissions after adding membership/editor-role plugins, and keep any custom HTML or tracking snippets tightly controlled and regularly audited.

Note: The date and certification information may change over time. It is advisable to verify the latest details on the plugin developer’s website.