BBcode XSS Vulnerability in NavBoard

Summary

Vulnerability
BBcode XSS Vulnerability in NavBoard
Discovered
2006.01.07
Last Update
0 n/a
ID
EV0019
CVE
CVE-2006-0140
Risk Level
medium
Type
Cross Site Scripting
Status
Unpatched
Vendor
NavBoard (http://navarone.f2o.org/)
Vulnerable Software
NavBoard (http://sourceforge.net/projects/navboard/)
Version
checked: V16 Stable(2.6.0) and V17beta2
PoC/Exploit
Available
Solution
Available
Discovered by
Aliaksandr Hartsuyeu (eVuln.com)

Description

Cross Site Scripting found in NavBoard (http://sourceforge.net/projects/navboard/) script.

Arbitrary script code insertion is possible in BBcode.

Vulnerable Script: post.php

BBcode isn't properly sanitized. This can be used to post arbitrary script code which will be executed in the browser of every visitor.

Administrator's cookie-based authentication is threatened.

Login and plain text Password are stored in Cookies.

Administrator can modify PHP Code from Administrator's panel.

PoC/Exploit

BBcode Examples:

For V16(2.6.0)
[b]<XSS>[/b][textlarge]<XSS>[/textlarge]

For V16(2.6.0) and V17beta2
[url=javascript:alert(XSS)]title[/url]

Solution.

No vendor-provided patch availabve.

Solution: disable BBcode

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