The target is running at least one instance of SquirrelMail whose version number is between 1.2.0 and 1.2.10 inclusive.  Such versions do not properly sanitize From headers, leaving users vulnerable to XSS attacks.  Further, since SquirrelMail displays From headers when listing a folder, attacks does not require a user to actually open a message, only view the folder listing.

For example, a remote attacker could effectively launch a DoS against a user by sending a message with a From header such as :

From:John Doe<script>document.cookie='PHPSESSID=xxx; path=/';</script><>

which rewrites the session ID cookie and effectively logs the user out.

***** Nessus has determined the vulnerability exists on the target
***** simply by looking at the version number(s) of Squirrelmail
***** installed there.

Detections

Analytics

SquirrelMail < 1.2.11 Multiple Script XSS

medium Nessus Plugin ID 14217

Version 1.28