Adam Wright HTMLTidy 'html-tidy-logic.php' Cross Site Scripting Vulnerability

Bugtraq ID:	31908
Class:	Input Validation Error
CVE:	CVE-2008-4761
Remote:	Yes
Local:	No
Published:	Oct 24 2008 12:00AM
Updated:	Nov 20 2008 07:14PM
Credit:	ShockShadow
Vulnerable:	Adam Wright HTML Tidy 0.5 + Kayako eSupport 3.20.2 + Kayako SupportSuite 3.30.2
Not Vulnerable:

Adam Wright HTMLTidy 'html-tidy-logic.php' Cross Site Scripting Vulnerability

Adam Wright HTMLTidy is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.

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

HTMLTidy 0.5 is vulnerable; other versions may also be affected. Products that include HTMLTidy as a component will also be vulnerable.

NOTE: This record was previously titled 'Kayako eSupport html-tidy-logic.php Cross Site Scripting Vulnerability'. It has been updated to properly describe the vulnerability as an HTMLTidy issue.

Adam Wright HTMLTidy 'html-tidy-logic.php' Cross Site Scripting Vulnerability

Attackers can exploit this issue by enticing an unsuspecting user to follow a malicious URI.

The following example URI is available:

• /data/vulnerabilities/exploits/31908.html

Adam Wright HTMLTidy 'html-tidy-logic.php' Cross Site Scripting Vulnerability

Solution:
Kayako has released an update that addresses this issue; please see the references for more information.

Adam Wright HTMLTidy 'html-tidy-logic.php' Cross Site Scripting Vulnerability

References:

• HTMLTidy (Xinha)
  
• HtmlTidy html-tidy-logic.php security patch (Jamie Edwards)
  
• Vendor Homepage (Kayako)