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Category:   Application (Forum/Board/Portal)  >   ZeroForum Vendors:   ZeroForum
ZeroForum Discussion Board Vulnerable to Cross-Site Scripting Attacks Because It Allows User-Supplied Javascript in BBCode Image Tags
SecurityTracker Alert ID:  1004165
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Apr 26 2002
Impact:   Disclosure of authentication information, Execution of arbitrary code via network, User access via network
Exploit Included:  Yes  

Description:   An input filtering vulnerability was reported in the ZeroForum discussion forum software. A remote user can conduct cross-site scripting attacks against ZeroForum users.

A remote user can reportedly insert Javascript within a BBCode image tag as follows:


When another ZeroForum user views a message, the Javascript will be executed in that user's browser. The code will originate from the site running ZeroForum and will run in the security context of that site. As a result, the code will be able to access the user's cookies associated with the site running ZeroForum and may be able to take actions acting as that user.

The vendor has reportedly been notified.

Impact:   A remote user can steal the cookies of a ZeroForum associated with the site running ZeroForum and may be able to take actions acting as that user.
Solution:   No solution was available at the time of this entry.
Vendor URL: (Links to External Site)
Cause:   Input validation error
Underlying OS:  UNIX (Any)

Message History:   None.

 Source Message Contents

Subject:  Re:[Advisory] phpBB 1.4.4 still suffers from Cross Site Scripting

Zeroforum is vuln to this as well. Notified a few weeks ago and heard 
nothing back.

>>After a similar bug was discovered in phpBB 1.4.2, the authors fixed the 
>>with which JavaScript could inserted by using an [IMG] tag like:


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