WordPress: HTTP response splitting and XSS vulnerabilities

Background

WordPress is a PHP and MySQL based content management and publishing system.

Description

Due to the lack of input validation in the administration panel scripts, WordPress is vulnerable to HTTP response splitting and cross-site scripting attacks.

Impact

A malicious user could inject arbitrary response data, leading to content spoofing, web cache poisoning and other cross-site scripting or HTTP response splitting attacks. This could result in compromising the victim’s data or browser.

Workaround

There is no known workaround at this time.

Resolution

All WordPress users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-apps/wordpress-1.2.2"