JW Player is prone to multiple cross-site scripting vulnerabilities because it fails to sufficiently sanitize user-supplied data.
An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and to launch other attacks.
JW Player 5.6 is vulnerable; other versions may also be affected.
Proof of Concept and Security Exploits
To exploit this issue, an attacker must entice an unsuspecting user to follow a malicious URI.
Solution: The vendor has fixed the issue in the SVN repository. Please see the references for more information.