CVE-2021-24217 (GCVE-0-2021-24217)

Vulnerability from cvelistv5 – Published: 2021-04-12 14:01 – Updated: 2024-08-03 19:21
VLAI KEVIntel
Title
Facebook for WordPress < 3.0.0 - PHP Object Injection with POP Chain
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.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Unknown Facebook for WordPress Affected: 3.0.0 , < 3.0.0 (custom)
Create a notification for this product.
Credits
Chloe Chamberland
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 1de4be15-6f6c-41ad-810c-58a557ccdf33

Vulnerability ID: CVE-2021-24217

Status: Confirmed

Status Updated: 2021-03-25 07:17 UTC

Exploited: Yes

Timestamps
First Seen: 2021-03-25
Asserted: 2021-03-25
Scope
Notes: KEVIntel entry: Facebook for WordPress < 3.0.0 - PHP Object Injection with POP Chain | Affected: Unknown / Facebook for WordPress | CVSS: 8.1 (HIGH) | EPSS: 0.06505 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Facebook for WordPress < 3.0.0 - PHP Object Injection with POP Chain
Vendor Unknown
Product Facebook for WordPress
Added Date 2021-03-25T07:17:45.000Z
Cvss Score 8.1
Epss Score 0.06505
Cvss Severity HIGH
Epss Percentile 0.90578
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-23 14:04 UTC | Updated: 2026-06-23 14:04 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.