TYPO3 Security Misconfiguration in User Session HandlingGHSA-xmgr-jff3-fcfv
MEDIUMFix: TYPO3-CMS/core@437bf78GHSA-xmgr-jff3-fcfv is a medium-severity (CVSS 6.5) vulnerability in typo3/cms-core. A fix is available for typo3/cms-core — see the affected versions and patch details below.
Real-World Exposure
typo3/cms-core🐘typo3/cms-coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
When users change their password existing sessions for that particular user account are not revoked. A valid backend or frontend user account is required in order to make use of this vulnerability.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | typo3/cms-core | ≥ 8.0.0&&< 8.7.25 | 8.7.25composer require typo3/cms-core:^8.7.25 |
| 🐘Packagist | typo3/cms-core | ≥ 9.0.0&&< 9.5.6 | 9.5.6composer require typo3/cms-core:^9.5.6 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for typo3/cms-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update typo3/cms-core to 8.7.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xmgr-jff3-fcfv is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is GHSA-xmgr-jff3-fcfv in your dependencies?
Find it across Packagist, including transitive dependencies.