{"id":"CVE-2026-71294","published":"2026-08-05T13:24:54.180","lastModified":"2026-08-10T12:17:32.113","description":"Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be instantiated. In plugins/comments/controllers/actions/CreateAction.php, a POST parameter obtained via (trim-only sanitization) is passed to with no restriction, reachable by any member with write access to comments (the default setting in plugins/comments/comments.setup.php).","cvssScore":7.6,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L","cwes":["CWE-502"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Cotonti/Cotonti","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/master/plugins/comments/controllers/actions/CreateAction.php","tags":[]}],"exploitRefs":[{"url":"https://github.com/Cotonti/Cotonti","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/master/plugins/comments/controllers/actions/CreateAction.php","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows deserialization of untrusted data, leading to potential code execution or data manipulation by authenticated users.","exploitability":"Exploitation requires write access to comments and basic parameter injection; moderately easy given typical CMS configurations.","blast_radius":"If exploited, could lead to full compromise of the application, including unauthorized data modification or theft.","remediation":"Restrict allowed classes during deserialization in CreateAction.php and update comments.setup.php to limit write access.","tags":["rce","deserialization","web","auth-required"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:53:29.362Z"}}