CVE-2026-42723: CWE-502 Deserialization of Untrusted Data in AncoraThemes CleanSkin
Description
CVE-2026-42723 is a critical vulnerability in AncoraThemes CleanSkin versions up to 1.5.0 that allows unauthenticated PHP object injection due to deserialization of untrusted data. This flaw can lead to full compromise of confidentiality, integrity, and availability of the affected system.
CVSS v3.1
Score 9.8critical
Affected software
AncoraThemes
CleanSkin
pkg:composer/ancorathemes/cleanskinRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-502, involves deserialization of untrusted data in AncoraThemes CleanSkin versions <= 1.5.0. It allows unauthenticated attackers to perform PHP object injection, potentially leading to remote code execution or other severe impacts. The CVSS 3.1 base score is 9.8, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can result in complete system compromise, including unauthorized code execution, data disclosure, and service disruption. The vulnerability is exploitable remotely without authentication, making it highly dangerous.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to vulnerable instances and monitor for suspicious activity related to PHP object injection attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-04-29T09:05:20.867Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aca96b22cdf04f6564a5c03
Added to database: 10/10/2026, 19:49:06 UTC
Last enriched: 10/10/2026, 20:48:40 UTC
Last updated: 10/10/2026, 23:48:13 UTC
Views: 2
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