MediaWiki: Multiple vulnerabilities

Background

The MediaWiki wiki web application as used on wikipedia.org.

Description

Multiple vulnerabilities have been discovered in mediawiki. Please review the CVE identifiers referenced below for details.

Impact

MediaWiki allows remote attackers to bypass authentication, to perform imports from any wgImportSources wiki via a crafted POST request, to conduct cross-site scripting (XSS) attacks or obtain sensitive information, to inject arbitrary web script or HTML, to conduct clickjacking attacks, to execute arbitrary PHP code, to inject arbitrary web script or HTML, to bypass intended access restrictions and to obtain sensitive information.

Workaround

There is no known workaround at this time.

Resolution

All MediaWiki users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-apps/mediawiki-1.18.2"