CVE-2026-91939

Cotonti 1.0.0 Comments plugin passes the ci GET parameter directly to unserialize() without an allowed_classes restriction. This allows unauthenticated attackers to inject arbitrary PHP objects via crafted serialized payloads, triggering gadget chains that can lead to database manipulation or rem...

CVE-2026-91939: Deserialization of Untrusted Data

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize without allowedclasses restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads ...