{"id":"CVE-2026-77140","title":"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","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 who knows the UID of a visible employee record can se…","severity":"none","cwe":["CWE-639","CWE-862"],"published":"2026-08-25","updated":"2026-09-28","sourceUpdated":"2026-09-28T23:10:00.143","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77140","references":[{"url":"https://typo3.org/security/advisory/typo3-ext-sa-2026-018","label":"f4fb688c-4412-4426-b4b8-421ecf27b14a"}],"tags":["nvd"],"ingestedAt":"2026-09-28T23:23:00.542Z","slug":"CVE-2026-77140","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}