{"id":"CVE-2026-77129","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77129","generatedAt":"2026-10-28T01:11:26.224Z","title":"A backend user with edit access to the event plugin or Backend Module can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content objects.","description":"The extension passes an editor-configurable email subject string directly into a Fluid template source without restriction. A backend user with edit access to the event plugin or Backend Module can supply Fluid ViewHelper syntax in this field to disclose sensitive data or execute TypoScript content objects. Exploitation of this issue requires an authenticated backend account with edit access to the event registration plugin or backend module.","published":"2026-08-25T09:17:33.000Z","lastModified":"2026-08-26T17:13:53.000Z","status":"Deferred","sourceIdentifier":"f4fb688c-4412-4426-b4b8-421ecf27b14a","cvss":{"version":"4.0","score":7.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-1336"],"affected":[],"epss":{"score":0.00396,"percentile":0.33582,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://typo3.org/security/advisory/typo3-ext-sa-2026-023","source":"f4fb688c-4412-4426-b4b8-421ecf27b14a"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77129","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}