CVE-2025-66571: CWE-502: Deserialization of Untrusted Data in UNA CMS
UNA CMS versions 9.0.0-RC1 - 14.0.0-RC4 contain a PHP object injection vulnerability in BxBaseMenuSetAclLevel.php where the profile_id POST parameter is passed to PHP unserialize() without proper handling, allowing remote, unauthenticated attackers to inject arbitrary PHP objects and potentially write and execute arbitrary PHP code.
AI Analysis
Technical Summary
CVE-2025-66571 is a critical vulnerability in UNA CMS affecting versions 9.0.0-RC1 through 14.0.0-RC4. The vulnerability arises from unsafe deserialization of untrusted data in the BxBaseMenuSetAclLevel.php file, where the profile_id POST parameter is unserialized without proper sanitization. This allows remote attackers with no authentication to perform PHP object injection, potentially leading to arbitrary code execution on the server hosting the CMS.
Potential Impact
Successful exploitation allows remote unauthenticated attackers to inject arbitrary PHP objects and potentially execute arbitrary PHP code on the server. This can lead to full compromise of the affected system, including data theft, system manipulation, or further attacks within the network.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable endpoint and consider implementing web application firewall rules to detect and block suspicious serialized data in the profile_id POST parameter. Monitor vendor channels for updates and apply official patches once released.
CVE-2025-66571: CWE-502: Deserialization of Untrusted Data in UNA CMS
Description
UNA CMS versions 9.0.0-RC1 - 14.0.0-RC4 contain a PHP object injection vulnerability in BxBaseMenuSetAclLevel.php where the profile_id POST parameter is passed to PHP unserialize() without proper handling, allowing remote, unauthenticated attackers to inject arbitrary PHP objects and potentially write and execute arbitrary PHP code.
CVSS v4.0
Score 9.3critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-66571 is a critical vulnerability in UNA CMS affecting versions 9.0.0-RC1 through 14.0.0-RC4. The vulnerability arises from unsafe deserialization of untrusted data in the BxBaseMenuSetAclLevel.php file, where the profile_id POST parameter is unserialized without proper sanitization. This allows remote attackers with no authentication to perform PHP object injection, potentially leading to arbitrary code execution on the server hosting the CMS.
Potential Impact
Successful exploitation allows remote unauthenticated attackers to inject arbitrary PHP objects and potentially execute arbitrary PHP code on the server. This can lead to full compromise of the affected system, including data theft, system manipulation, or further attacks within the network.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable endpoint and consider implementing web application firewall rules to detect and block suspicious serialized data in the profile_id POST parameter. Monitor vendor channels for updates and apply official patches once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2025-12-04T16:17:41.799Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6931f4e10459f550ecf89e87
Added to database: 12/04/2025, 20:53:53 UTC
Last enriched: 07/30/2026, 00:31:38 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 266
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