What is CVE-2021-24217?

CVE-2021-24217 is a high-severity vulnerability in Facebook, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2021-04-12.

How severe is CVE-2021-24217?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2021-24217 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Facebook

CVE-2021-24217

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.

Vulnerability class: Insecure Deserialization

EPSS: 0.035 (88.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Facebook
Unknown Facebook For Wordpress — versions 3.0.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

20142995/nuclei-templates

References

contact@wpscan.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-24217?: CVE-2021-24217 is a high-severity vulnerability in Facebook, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2021-04-12.
How severe is CVE-2021-24217?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2021-24217 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.