User Enumeration via Response Timing in TYPO3

Summary

TYPO3 is an open source PHP based web content management system released under the GNU GPL. It has been discovered that observing response time during user authentication (backend and frontend) can be used to distinguish between existing and non-existing user accounts. Extension authors of 3rd party TYPO3 extensions providing a custom authentication service should check if the extension is affected by the described problem. Affected extensions must implement new `MimicServiceInterface::mimicAuthUser`, which simulates corresponding times regular processing would usually take. 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 this problem. There are no known workarounds for this issue.

Timeline

1. Sep 13, 2022, 5:40 PM UTCCVE published
2. Apr 23, 2025, 3:51 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Apr 23, 2025, 5:11 PM UTCRecord last updated

Affected versions

• TYPO3 typo3

  From 7.0.0 · fixed in 7.6.58; From 8.0.0 · fixed in 8.7.48; From 9.0.0 · fixed in 9.5.37; From 10.0.0 · fixed in 10.4.32; From 11.0.0 · fixed in 11.5.16

• typo3/cms-corePackagist

  From 7.0.0 · fixed in 7.6.58

• typo3/cms-corePackagist

  From 8.0.0 · fixed in 8.7.48

• typo3/cms-corePackagist

  From 9.0.0 · fixed in 9.5.37

• typo3/cms-corePackagist

  From 10.0.0 · fixed in 10.4.32

• typo3/cms-corePackagist

  From 11.0.0 · fixed in 11.5.16

• typo3/cmsPackagist

  From 10.0.0 · fixed in 10.4.32

• typo3/cmsPackagist

  From 11.0.0 · fixed in 11.5.16

References 3