Serendipity 'serendipity[filter][bp.ALT]' Parameter Cross Site Scripting Vulnerability

Bugtraq ID:	50502
Class:	Input Validation Error
CVE:	CVE-2011-4365
Remote:	Yes
Local:	No
Published:	Nov 03 2011 12:00AM
Updated:	Dec 01 2011 10:36PM
Credit:	Stefan Schurtz
Vulnerable:	Serendipity Serendipity 1.5.5
Not Vulnerable:	Serendipity Serendipity 1.6

Serendipity 'serendipity[filter][bp.ALT]' Parameter Cross Site Scripting Vulnerability

Serendipity is prone to a cross-site scripting vulnerability because it fails to sufficiently sanitize user-supplied data.

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 allow the attacker to steal cookie-based authentication credentials and launch other attacks.

This issue affects Serendipity 1.5.5; prior versions may also be affected.

Serendipity 'serendipity[filter][bp.ALT]' Parameter Cross Site Scripting Vulnerability

An attacker can exploit this issue by enticing an unsuspecting victim to follow a malicious URI.

The following example URI is available:

• /data/vulnerabilities/exploits/50502.txt

Serendipity 'serendipity[filter][bp.ALT]' Parameter Cross Site Scripting Vulnerability

Solution:
Vendor updates are available. Please see the references for more information.

Serendipity 'serendipity[filter][bp.ALT]' Parameter Cross Site Scripting Vulnerability

References:

• Serendipity Homepage (S9Y)
  
• Serendipity 'serendipity[filter][bp.ALT]' Cross-Site Scripting vulnerability (Stefan Schurtz)