Multiple vulnerabilities have been discovered in MediaWiki. Please
review the CVE identifiers referenced below for details.
Impact
A remote attacker may be able to execute arbitrary code, perform
man-in-the-middle attacks, obtain sensitive information or perform
cross-site scripting attacks.
Workaround
There is no known workaround at this time.
Resolution
All MediaWiki 1.21.x users should upgrade to the latest version:
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.