Facebook for WordPress 3.0.0-3.0.3 - CSRF to Stored XSS and Settings Deletion

published 2021-04-12 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11132

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

facebook facebook 3.0.4

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

wordfence.com https://www.wordfence.com/blog/2021/03/two-vulnerabilities-patched-in-facebook-for-wordpress-plugin/ referenced PoC, tagged "exploit" by a source, unverified
wpscan.com https://wpscan.com/vulnerability/169d21fc-d191-46ff-82e8-9ac887aed8a4 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Unknown Facebook for WordPress

Classification

Weakness

CWE-352 Cross-Site Request Forgery

Technology feeds

WordPress rss critical rss

References

wordfence.com /blog/2021/03/two-vulnerabilities-patched-in-facebook-for-wordpress-plugin/
exploit, third-party-advisory
wpscan.com /vulnerability/169d21fc-d191-46ff-82e8-9ac887aed8a4
exploit, third-party-advisory

Sources

CVE List CVE-2021-24218
NVD CVE-2021-24218

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary