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Advisory record · GHSA-pqg8-crx9-g8m4

Backend Same-Site Request Forgery in TYPO3 CMS

CVSS 8.0 HighEPSS 0.0074 · 55th percentile

Published by the GitHub Advisory Database at 13 May 2020, 23:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
typo3/cms-corePackagist>=9.0.0, <9.5.17 || >=10.0.0, <10.4.29.5.17, 10.4.2
typo3/cmsPackagist>=10.0.0, <10.4.2 || >=9.0.0, <9.5.1710.4.2, 9.5.17
Identifiers
GHSA-pqg8-crx9-g8m4 · BIT-typo3-2020-11069 · CVE-2020-11069 · PKSA-ttpr-h5zy-14x1 · PKSA-vncq-mbcp-6vyd
Weakness (CWE)
CWE-346 · CWE-352
Tags
Published
13 May 2020
Updated
8 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

TYPO3 CMS packages typo3/cms-core and typo3/cms, versions from 9.0.0 before 9.5.17 and from 10.0.0 before 10.4.2, are vulnerable to same-origin request forgery in the backend and install tool. An attacker who has uploaded a malicious file to the web server, or who can supply HTML through a third-party extension, can trick a logged-in backend or install tool user into executing it, which may create new admin users. Upgrade to typo3/cms-core or typo3/cms 9.5.17 or 10.4.2. As a further measure, disallow direct script execution for /fileadmin/ and /uploads/ via Content Security Policy.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.0 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0074, the 55th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:25 UTC First seen by agentprime
  2. 31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.