{"id":"CVE-2026-93872","summary":"Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit Action cb Parameter","details":"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.","modified":"2026-09-19T11:45:42.499751125Z","published":"2026-09-18T19:56:37.540Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-502"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93872.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93872.json"},{"type":"PACKAGE","url":"https://github.com/Cotonti/Cotonti"},{"type":"ARTICLE","url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/comments/controllers/actions/EditAction.php"},{"type":"ARTICLE","url":"https://github.com/Cotonti/Cotonti/blob/1.0.0/system/cache.php"},{"type":"REPORT","url":"https://github.com/Cotonti/Cotonti/issues/1894"},{"type":"FIX","url":"https://github.com/Cotonti/Cotonti/pull/1897"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93872"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/cotonti-1.0.0-php-object-injection-via-comments-plugin-edit-action-cb-parameter"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/cotonti/cotonti","events":[{"introduced":"0d554e939a315e7f7f18fba3ca1132b80c6a1adb"},{"last_affected":"0d554e939a315e7f7f18fba3ca1132b80c6a1adb"}],"database_specific":{"extracted_events":[{"introduced":"1.0.0"},{"last_affected":"1.0.0"}],"source":"AFFECTED_FIELD"}}],"versions":["1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93872.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}