cPanel – Exim Valiases Arbitrary File Access (R911-0169)

Type: Arbitrary File Access
Location: Local
Impact: High
Product: cPanel
Vulnerable Version: All versions prior to the fixed builds below.
Fixed Version:,, &
CVE: -
R911: 0169
Date: 2014-07-28
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 obtain the contents of any file on a cPanel server, including sensitive root files, by modifying the user valias to include a carefully crafted string which can then be accessed via a specific email request.


We have deemed this vulnerability to be rated as HIGH due to the fact that a user can access any file on the server with minimal effort.

Vulnerable Version:

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

Fixed Version:

This vulnerability was patched in cPanel,, &

Vendor Contact Timeline:

2014-06-22: Vendor contacted via email.
2014-06-22: Vendor confirms vulnerability.
2014-07-21: Vendor issues updates to all builds.
2014-07-28: RACK911 issues security advisory.