CVE-2021-24217

Name: CVE-2021-24217
Creator: NVD / NIST
Published: 2021-04-12T14:15:15.24+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 3.52%

Last modified Jun 17, 2026

CVE-2021-24217 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 3.52% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

3.52%

87.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Facebook	Facebook	< 3.0.0

References

https://wpscan.com/vulnerability/509f2754-a1a1-4142-9126-ae023a88533aExploit, 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/509f2754-a1a1-4142-9126-ae023a88533aExploit, 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-2021-24217?

How severe is CVE-2021-24217?

CVE-2021-24217 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 3.52% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24217?

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-2021-24217?

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

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Source: NVD / NIST