CVE-2021-21359
TYPO3 is an open source PHP based web content management system.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.73% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-405, CWE-674
- Affected
- typo3/typo3
- Source
- security-advisories@github.com
References
- https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397pThird Party Advisory
- https://packagist.org/packages/typo3/cms-coreRelease Notes, Third 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 Notes, Third Party Advisory
- https://typo3.org/security/advisory/typo3-core-sa-2021-005Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.