TYPO3 CMS - Broken Access Control in Backend and Install Tool (TYPO3 TYPO3 CMS)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.24 % · percentile 15 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- TYPO3
- NVD status
- Deferred
Description
The referrer enforcement introduced with TYPO3-CORE-SA-2020-006 (CVE-2020-11069) became ineffective in TYPO3 v13.0, where TYPO3 CMS started serving the backend and Install Tool applications from the site's main entry script instead of the dedicated typo3/ directory. Whether a request originated from the backend or Install Tool itself was determined by comparing the referrer against the directory of the entry script, which since then is the site root. As a consequence, requests originating from any script running on one of the TYPO3 instance's own domains, such as a frontend page, were accepted by backend routes and Install Tool endpoints. Attackers able to execute JavaScript on one of those domains, for instance by exploiting a cross-site scripting vulnerability, could invoke these endpoints via Fetch/XHR with the privileges of an authenticated victim's user session. This issue affects TYPO3 CMS versions 13.0.0-13.4.33 and 14.0.0-14.3.5.
Weaknesses (CWE)
References
- https://typo3.org/security/advisory/typo3-core-sa-2026-021
- https://typo3.org/security/advisory/typo3-core-sa-2020-006
- https://github.com/TYPO3/typo3/commit/ae0abd329d52285fe6e92804c3608820ad45e872
- https://github.com/TYPO3/typo3/commit/a0e8ee06a40e959b9e7b06a4b1cb19d3a0d3dcf7
- https://github.com/TYPO3/typo3/commit/4a75e862c589c85d795d7c65dcdc835f8f413efc
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 7.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | TYPO3 |
| CVSS 4.0 | HIGH 7.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · f4fb688c-4412-4426-b4b8-421ecf27b14a (Secondary) |
Advisories
- GHSA-68jx-f42c-7599 — TYPO3 CMS - Broken Access Control in Backend and Install Tool
European references
- ENISA EUVD · EUVD-2026-55971
- GCVE · GCVE-0-2026-19418
CERT-FR advisories
- CERTFR-2026-AVI-1036 — Multiples vulnérabilités dans Typo3 · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| TYPO3 · TYPO3 CMS | affected 13.0.0 < 13.4.34 ; affected 14.0.0 < 14.3.6 |
| TYPO3 · TYPO3 CMS | affected 13.0.0 < 13.4.34 ; affected 14.0.0 < 14.3.6 |
| TYPO3 · TYPO3 CMS | affected 14.0.0 < 14.3.6 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |