Official Facebook Pixel Vulnerabilities

The Meta pixel for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 5.2.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a us...

CVSS:

7.2

Affected:

up to 5.2.1

Fixed in:

5.2.2

Disclosed:

Jul 31, 2026

CVE-2026-66705 on NVD →

[en] The run_action function of the Facebook for WordPress plugin before 3.0.0 deserializes user supplied data making it possible for PHP objects to be supplied creating an Object Injection vulnerability. There was also a useable magic method in the plugin that could be used to achieve remote code execution.

Affected:

up to 3.0.0

Fixed in:

3.0.0

Disclosed:

Apr 12, 2021

CVE-2021-24217 on NVD →

[en] The wp_ajax_save_fbe_settings and wp_ajax_delete_fbe_settings AJAX actions of the Facebook for WordPress plugin before 3.0.4 were vulnerable to CSRF due to a lack of nonce protection. The settings in the saveFbeSettings function had no sanitization allowing for script tags to be saved.

Affected:

3.0.0 – 3.0.3

Fixed in:

3.0.3

Disclosed:

Apr 12, 2021

CVE-2021-24218 on NVD →

The wp_ajax_save_fbe_settings and wp_ajax_delete_fbe_settings AJAX actions of the Facebook for WordPress plugin before 3.0.4 were vulnerable to CSRF due to a lack of nonce protection. The settings in the saveFbeSettings function had no sanitization allowing for script tags to be saved.

CVSS:

8.8

Affected:

3.0.0 – 3.0.4

Fixed in:

3.0.4

Disclosed:

Mar 25, 2021

CVE-2021-24218 on NVD →

The run_action function of the Facebook for WordPress plugin before 3.0.0 deserializes user supplied data making it possible for PHP objects to be supplied creating an Object Injection vulnerability. There was also a useable magic method in the plugin that could be used to achieve remote code execution.

CVSS:

8.1

Affected:

up to 2.2.2

Fixed in:

3.0.0

Disclosed:

Mar 25, 2021

CVE-2021-24217 on NVD →

PHP Object Injection vulnerability discovered by WordFence in WordPress Facebook for WordPress plugin (versions <= 2.2.2).

Affected:

up to 3.0.0

Fixed in:

3.0.0

Disclosed:

Mar 25, 2021

Cross-Site Request Forgery (CSRF) leading to Stored Cross-Site Scripting (XSS) vulnerability discovered by WordFence in WordPress Facebook for WordPress plugin (versions 3.0.0 – 3.0.3).

Affected:

3.0.0 – 3.0.3

Fixed in:

3.0.3

Disclosed:

Mar 25, 2021