CVE-2021-24217
High PUBLISHEDFacebook for WordPress < 3.0.0 - PHP Object Injection with POP Chain
Not yet in CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Apr 12, 2021
- Exploitation Reported
- Mar 25, 2021
- CVSS
- 8.1 High
- EPSS
- 6.5%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Unknown |
Facebook for WordPress
|
3.0.0 to < 3.0.0 |
Affected |
CVE References
- wpscan.com/vulnerability/509f2754-a1a1-4142-9126-ae023a... wpscan.com · CVE Record https://wpscan.com/vulnerability/509f2754-a1a1-4142-9126-ae023a88533a
- wordfence.com/blog/2021/03/two-vulnerabilities-patched-in-... wordfence.com · CVE Record https://www.wordfence.com/blog/2021/03/two-vulnerabilities-patched-in...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| Wordfence First | 2021-03-25 07:17 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:P
Exploitation Status
Exploited in the wild
Recorded 2021-03-25 07:17:45 UTC · Wordfence
Weaknesses (CWE)
-
Deserialization of Untrusted Data
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:01 UTC over 5 years ago14:01 UTC · over 5 years ago
CVE published
Vulnerability disclosed publicly
-
07:17 UTC over 5 years ago07:17 UTC · over 5 years ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
00:00 UTC over 5 years ago00:00 UTC · over 5 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2021-24217
{
"cve_id": "CVE-2021-24217",
"title": "Facebook for WordPress < 3.0.0 - PHP Object Injection with POP Chain",
"affected_vendor": "Unknown",
"affected_product": "Facebook for WordPress",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "High",
"cvss_score": 8.1,
"epss_score": 0.06505,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}