SEC Consult SA-20130311-0 :: Persistent cross-site scripting in jforum Mar 11 2013 11:15AM
SEC Consult Vulnerability Lab (research sec-consult com)
SEC Consult Vulnerability Lab Security Advisory < 20130311-0 >
title: Persistent cross-site scripting vulnerability
product: jforum
vulnerable version: 2.1.9
fixed version: -
impact: medium
homepage: http://jforum.net/
found: 2012-09-20
by: A. Antukh
SEC Consult Vulnerability Lab

Vendor description:
jforum is a powerful and robust discussion board system implemented in Java.

"jforum is a discussion board software - a forum - widely known for half a
decade already. It powers many big forums around the globe, including
Electronic Arts' gaming forums, JavaRanch (one of the biggest and oldest Java
communities), GUJ (the biggest Java development community for Portuguese
speakers). It is an Open Source project, maintained by serious developers."

Source: http://jforum.net/contact.jsp

Vulnerability overview/description:
A module "pm" provided in the standard installation of jforum includes the
action "sendSave", which suffers from a persistent cross-site scripting
vulnerability due to insufficient validation of user supplied data.

An authenticated user is able to perform cross-site scripting attacks e.g.
create relogin trojan horses or steal session cookies in the context of the
affected website that uses a vulnerable version of jforum.

Proof of concept:
The vulnerability is exploited due to improper validation of a certain parameter.
PoC URL has been removed as no vendor patch is available.

Vulnerable / tested versions:
The vulnerability is verified to exist in 2.1.9 version of jforum which is the
most recent at the moment of writing the advisory.

Fixed version:
No patch available.

Vendor contact timeline:
2012-11-15: Contacted vendor through rafael (at) insanecorp (dot) com [email concealed]
2012-11-15: Initial vendor response - issues will be verified
2012-11-20: Under investigation / Being fixed in main codeline
2013-02-28: Vendor notification about advisory release on 2013-03-08 according to
the SEC Consult responsible disclosure policy.
2013-03-05: Vendor agrees with dates of publishing the advisory, will maybe
supply patch in the future (does currently not work on project)
2013-03-11: Public release of SEC Consult advisory

No workaround available

Advisory URL:

SEC Consult Unternehmensberatung GmbH

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Tel.: +43 / 1 / 890 30 43 - 0
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Mail: research at sec-consult dot com

EOF A. Antukh / @2013

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