Vulnerability Description
TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.25, 10.4.14, 11.1.1 requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This is fixed in versions 9.5.25, 10.4.14, 11.1.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Typo3 | Typo3 | >= 9.0.0, < 9.5.25 |
Related Weaknesses (CWE)
References
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397pThird Party Advisory
- https://packagist.org/packages/typo3/cms-coreRelease NotesThird Party Advisory
- https://typo3.org/security/advisory/typo3-core-sa-2021-005Vendor Advisory
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397pThird Party Advisory
- https://packagist.org/packages/typo3/cms-coreRelease NotesThird Party Advisory
- https://typo3.org/security/advisory/typo3-core-sa-2021-005Vendor Advisory
FAQ
What is CVE-2021-21359?
CVE-2021-21359 is a vulnerability with a CVSS score of 5.9 (MEDIUM). TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.25, 10.4.14, 11.1.1 requesting invalid or non-existing resources via HTTP triggers the page error handler ...
How severe is CVE-2021-21359?
CVE-2021-21359 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21359?
Check the references section above for vendor advisories and patch information. Affected products include: Typo3 Typo3.