CVE-2024-55892 is a medium-severity (CVSS 4.8) Open Redirect vulnerability in typo3/cms-core. A fix is available for typo3/cms-core — see the affected versions and patch details below.
Potential Open Redirect via Parsing Differences in TYPO3
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2024-55892.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
typo3/cms-core🐘typo3/cms-core🐘typo3/cms-core🐘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
Problem
Applications that use TYPO3\CMS\Core\Http\Uri to parse externally provided URLs (e.g., via a query parameter) and validate the host of the parsed URL may be vulnerable to open redirect or SSRF attacks if the URL is used after passing the validation checks.
Solution
Update to TYPO3 versions 9.5.49 ELTS, 10.4.48 ELTS, 11.5.42 ELTS, 12.4.25 LTS, 13.4.3 LTS that fix the problem described.
Credits
Thanks to Sam Mush and Christian Eßl who reported this issue and to TYPO3 core & security team member Benjamin Franzke who fixed the issue.
References
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | typo3/cms-core | ≥ 9.0.0&&< 9.5.49 | 9.5.49composer require typo3/cms-core:^9.5.49 |
| 🐘Packagist | typo3/cms-core | ≥ 10.0.0&&< 10.4.48 | 10.4.48composer require typo3/cms-core:^10.4.48 |
| 🐘Packagist | typo3/cms-core | ≥ 11.0.0&&< 11.5.42 | 11.5.42composer require typo3/cms-core:^11.5.42 |
| 🐘Packagist | typo3/cms-core | ≥ 12.0.0&&< 12.4.25 | 12.4.25composer require typo3/cms-core:^12.4.25 |
| 🐘Packagist | typo3/cms-core | ≥ 13.0.0&&< 13.4.3 | 13.4.3composer require typo3/cms-core:^13.4.3 |
Affected Products
typo3typo3Detection & 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 9.5.49 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-55892 is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.
Frequently Asked Questions
Is CVE-2024-55892 in your dependencies?
Find it across Packagist, including transitive dependencies.