• Advisory ID: DRUPAL-SA-CONTRIB-2013-071
  • Project: Flag (third-party module)
  • Version: 7.x
  • Date: 2013-August-28
  • Security risk: Moderately critical
  • Exploitable from: Remote
  • Vulnerability: Cross Site Scripting


The Flag module allows creation of customizable flags on entities.

Flag does not properly sanitize the name of a flag on the main flag administration page, allowing a malicious user to embed scripts within a page, resulting in a Cross-site Scripting (XSS) vulnerability.

This vulnerability is mitigated by the fact that an attacker must have the 'Administer flags' permission.

CVE identifier(s) issued

  • CVE-2013-4336

Versions affected

  • Flag 7.x-3.x versions prior to 7.x-3.1.

Drupal core is not affected. If you do not use the contributed Flag module, there is nothing you need to do.


Install the latest version:

  • If you use the Flag module for Drupal 7.x, upgrade to Flag 7.x-3.1

Also see the Flag project page.

Reported by

Fixed by

Coordinated by

Contact and More Information

The Drupal security team can be reached at security at drupal.org or via the contact form at http://drupal.org/contact.

Learn more about the Drupal Security team and their policies, writing secure code for Drupal, and securing your site.