CVE-2021-24217 json
Facebook for WordPress < 3.0.0 - PHP Object Injection with POP Chain
published 2021-04-12 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11131
- cvss
- 8.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.5%
- EPSS 3.5% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- facebook facebook 3.0.0
Exploit prediction
3.52% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/509f2754-a1a1-4142-9126-ae023a88533a referenced PoC, tagged "exploit" by a source, unverified
- 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
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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-502 Deserialization of Untrusted Data
- Technology feeds
References
-
wpscan.com
/vulnerability/509f2754-a1a1-4142-9126-ae023a88533a
exploit, third-party-advisory
-
wordfence.com
/blog/2021/03/two-vulnerabilities-patched-in-facebook-for-wordpress-plugin/
exploit, third-party-advisory
Sources
- CVE List CVE-2021-24217
- NVD CVE-2021-24217
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