GHSA-52PR-7VMF-2W7X Concrete CMS is vulnerable to PHP Object Injection via unserialize() calls in the Workflow, Form block, and File/Set components

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize calls in the Workflow, Form block, and File/Set components that lack the allowedclasses restriction. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been...

PT-2026-58948

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize calls in the Workflow, Form block, and File/Set components that lack the allowed classes restriction. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has bee...