[CVE-2026-91939] Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize() without allowed_classes r…

Descripción técnica

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.

Puntuación CVSS

Score: 9.8/10 — Severidad: CRITICAL — Estado NIST: Received

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Debilidades (CWE)

CWE-502

Fuente oficial

Publicado en NIST NVD.