TYPO3 CMS Stored Cross-Site Scripting via FileDumpController

> ### Meta
> * CVSS: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C (5.0)

Problem

It has been discovered that the FileDumpController (backend and frontend context) is vulnerable to cross-site scripting when malicious files are displayed using this component. A valid backend user account is needed to exploit this vulnerability.

Solution

Update to TYPO3 version 7.6.58 ELTS, 8.7.48 ELTS, 9.5.37 ELTS, 10.4.32 or 11.5.16 that fix the problem described above.

Credits

Thanks to Vautia who reported this issue and to TYPO3 core & security team member Oliver Hader who fixed the issue.

References

• TYPO3-CORE-SA-2022-009
• Vulnerability Report on huntr.dev (embargoed +30 days)