XML External Entity (XXE) Processing in TYPO3 Core
Date: 2024-06
Affected: composer/typo3/cms, composer/typo3/cms
Attack vector: dos
Category: vulnerability-disclosure
Severity: High

All XML processing within the TYPO3 CMS are vulnerable to XEE processing. This can lead to load internal and/or external (file) content within an XML structure. Furthermore it is possible to inject arbitrary files for an XML Denial of Service attack. For more information on that topic see https://www.owasp.org/index.php/XML_External_Entity_(XXE)_Processing.


Mitigations:

Architectural layers (MAESTRO):