{"id":"CVE-2026-93872","published":"2026-09-18T20:17:35.250","lastModified":"2026-09-22T20:53:07.383","description":"Cotonti 1.0.0 passes the base64-decoded cb parameter to unserialize() without allowed_classes restriction in the comments plugin EditAction. Registered users with comment write permissions can instantiate arbitrary PHP objects and potentially achieve file write or code execution through gadget chains.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-502"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Cotonti/Cotonti","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAction.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/issues/1894","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/pull/1897","tags":[]},{"url":"https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugin-edit-action-cb-parameter","tags":[]}],"exploitRefs":[{"url":"https://github.com/Cotonti/Cotonti","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAction.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.php","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/issues/1894","tags":[]},{"url":"https://github.com/Cotonti/Cotonti/pull/1897","tags":[]}],"hasPoc":true,"ai":null}