Drupal core’s text filtering system provides several features including removing inappropriate HTML tags and automatically linking content that appears to be a link. A pattern in Drupal’s text matching was found to be inefficient with certain specially crafted strings. This vulnerability is mitigated by the fact that users must have the ability to post content sent to the filter system such as a role with the “post comments” or “Forum topic: Create new content” permission.
Part of security release SA-CORE-2012-002
This vulnerability affects the following application versions:
- Drupal 7.0
- Drupal 7.1
- Drupal 7.2
- Drupal 7.3
- Drupal 7.4
- Drupal 7.5
- Drupal 7.6
- Drupal 7.7
- Drupal 7.8
- Drupal 7.9
- Drupal 7.10
- Drupal 7.11
- Drupal 7.12