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Project: 
Drupal core
Date: 
2024-October-16
Security risk: 
Moderately critical 13 ∕ 25 AC:Basic/A:None/CI:None/II:All/E:Theoretical/TD:Uncommon
Vulnerability: 
Improper error handling
Affected versions: 
>=10.0 < 10.2.10
Description: 

Under certain uncommon site configurations, a bug in the CKEditor 5 module can cause some image uploads to move the entire webroot to a different location on the file system. This could be exploited by a malicious user to take down a site.

The issue is mitigated by the fact that several non-default site configurations must exist simultaneously for this to occur.

Solution: 

Install the latest version:

If you are using Drupal 10.2, update to Drupal 10.2.10.
Drupal 10.3 and above are not affected, nor is Drupal 7.

All versions of Drupal 10 prior to 10.2 are end-of-life and do not receive security coverage. (Drupal 8 and Drupal 9 have both reached end-of-life.)

This advisory is not covered by Drupal Steward.

Reported By: 
Pierre Rudloff
Fixed By: 
catch of the Drupal Security Team
Lee Rowlands of the Drupal Security Team
Benji Fisher of the Drupal Security Team
Kim Pepper
Wim Leers
xjm of the Drupal Security Team
Coordinated By: 
xjm of the Drupal Security Team
Dave Long of the Drupal Security Team
Juraj Nemec of the Drupal Security Team

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