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.
CVSS v3.1 Score
9.8
/ 10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Information
- Published
- 15 sept. 2026
- Updated
- 15 sept. 2026
- Status
- Received
- Source
- disclosure@vulncheck.com
Weaknesses (CWE)
CWE-502
References (7)
Similar CVEs
Other vulnerabilities of type CWE-502
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