cPanel – cPAddons Moderation Stored XSS (R911-0137)

Type: XSS
Location: Remote
Impact: High
Product: cPanel
Website: http://www.cpanel.net
Vulnerable Version: All versions prior to the fixed builds below.
Fixed Version: 11.42.0.23, 11.40.1.13 & 11.38.2.23
CVE: -
R911: 0137
Date: 2014-03-31
By: Rack911

Product Description:

cPanel is an easy-to-use control panel that gives web hosts and the website owners they serve, the ability to quickly and easily manage their servers and websites. Web Host Manager (WHM) is a part of the cPanel software, often used by resellers and system administrators.

Vulnerability Description:

It is possible for a malicious user to create a stored XSS vulnerability within the cPAddons moderation files which could cause dangerous code to be rendered within the administrators web browser when using WHM.

Impact:

We have deemed this vulnerability to be rated as HIGH due to the fact that dangerous code can be rendered within the administrators web browser.

Vulnerable Version:

This vulnerability was tested against cPanel 11.40.0 #19 and is believed to exist in all versions prior to the fixed builds below.

Fixed Version:

This vulnerability was patched in cPanel 11.42.0.23, 11.40.1.13 & 11.38.2.23.

Vendor Contact Timeline:

2014-02-15: Vendor contacted via email.
2014-02-18: Vendor confirms vulnerability.
2014-03-24: Vendor issues updates to all builds.
2014-03-31: Rack911 issues security advisory.