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XOOPS Multiple Cross-Site Scripting Vulnerabilities

Sense of Security - Security Advisory - SOS-09-005 

Release Date.                  31-Jul-2009
Last Update.                   31-Jul-2009
Vendor Notification Date.      15-Jun-2009
Product.                       XOOPS
Platform.                      Independent
Affected versions.             2.3.3 (verified), possibly others
Severity Rating.               Medium
Impact.                        Cookie/credential theft, 
                               impersonation, loss of 
                               confidentiality
Attack Vector.                 Remote
Solution Status.               Vendor patch
CVE reference.                 Not yet assigned

Details.
XOOPS is a content management system written in PHP. During an
application penetration test Sense of Security identified that 
Input passed to the 'op' parameter of viewpmsg.php, and in the 
query string of user.php are vulnerable to Cross-Site Scripting 
vulnerabilities. This occurred as a result of the application 
not properly filtering HTML tags which allowed malicious 
JavaScript to be embedded. When input is incorrectly validated 
and not properly sanitised and then displayed in a web page, 
attackers can trick users into viewing the web page and causing
malicious code to be executed.

Proof of concept.
http://lP/xoops-2.3.3/htdocs/modules/pm/viewpmsg.php?op='
"><script>alert('vulnerable')
</script><link id='http://lP/xoops-2.3.3/htdocs
/modules/profile/user.php?"><script>alert('
vulnerable')</script>

Solution.
Vendor patch

Discovered by.
SOS Labs.

Telephone 1300 922 923.

For an engagement enquiry.
For an information request.