The Shorten URLs module for Drupal is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied text.
An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may help the attacker steal cookie-based authentication credentials and launch other attacks.
Shorten URLs 6.x-1.x versions prior to 6.x-1.13 and 7.x-1.x versions prior to 7.x-1.2 are vulnerable.
Proof of Concept and Security Exploits
An attacker can exploit this issue by enticing an unsuspecting user to follow a malicious URI.
Solution: Vendor updates are available. Please see the references for more information.