{"id":"CVE-2026-77140","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-77140","summary":"The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor…","details":"The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite that record without a valid edit link or any ownership check.","published":"2026-08-25T09:17:34.807","modified":"2026-08-25T09:17:34.807","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://typo3.org/security/advisory/typo3-ext-sa-2026-018"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-25T09:17:34.807"}}