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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.035 (88.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000
Affected products
- Facebook For WordPress — versions 3.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/509f2754-a1a1-4142-9126-ae023a88533a (Exploit, Third Party Advisory)
- www.wordfence.com/blog/2021/03/two-vulnerabilities-patched-in-facebook-for-word… (Exploit, Third Party Advisory)
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.