CVE-2026-87930

The record

MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods and corrupt application state or achieve code execution if gadget classes exist.

Affected packages

Related vulnerabilities

• CVE-2026-114724 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection… CWE-502
• CVE-2026-112081 A vulnerability was determined in hankcs HanLP up to 2.1.0-beta.64. CWE-502
• CVE-2026-96745 Deserialization of untrusted data in the command monitoring support of the MongoDB PHP… CWE-502
• CVE-2026-62107 Unauthenticated PHP Object Injection in Masteriyo - LMS <= 3.4.0 versions. CWE-502
• CVE-2026-62103 Unauthenticated PHP Object Injection in Everest Forms <= 3.6.0 versions. CWE-502
• CVE-2026-62105 Unauthenticated PHP Object Injection in ThemeREX Addons < 2.45.0 versions. CWE-502
• CVE-2026-73699 FileRun before 2026.3.0 contains a PHP object injection vulnerability that allows… CWE-502
• CVE-2026-82925 The Site Reviews WordPress plugin before 8.3.0 does not prevent request data from being… CWE-502