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CVE-2026-91939

Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter

CVSS 4.0 9.3 CRITICALCVSS 3.1 9.8 CRITICALCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-91939

Published

Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize() without allowed_classes restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads to trigger gadget chains and achieve database manipulation or code execution.

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CVE-2026-91939 · CVE overview and exploitation status

cve-program · CVE-2026-91939

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