CVE-2021-24218

Name: CVE-2021-24218
Creator: NVD / NIST
Published: 2021-04-12T14:15:15.337+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.70%

Last modified Jun 17, 2026

CVE-2021-24218 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.70%

48.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Facebook	Facebook	>= 3.0.0, < 3.0.4

References

https://wpscan.com/vulnerability/169d21fc-d191-46ff-82e8-9ac887aed8a4Exploit, Third Party Advisory
https://www.wordfence.com/blog/2021/03/two-vulnerabilities-patched-in-facebook-for-wordpress-plugin/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/169d21fc-d191-46ff-82e8-9ac887aed8a4Exploit, Third Party Advisory
https://www.wordfence.com/blog/2021/03/two-vulnerabilities-patched-in-facebook-for-wordpress-plugin/Exploit, Third Party Advisory

Timeline

Published: Apr 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24218?

How severe is CVE-2021-24218?

CVE-2021-24218 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24218?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24218?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST