Multiple vulnerabilities have been discovered in MediaWiki. Please
review the CVE identifiers and MediaWiki announcement referenced below
for details.
Impact
A remote attacker may be able to execute arbitrary code with the
privileges of the process, create a Denial of Service condition, obtain
sensitive information, bypass security restrictions, and inject arbitrary
web script or HTML.
Workaround
There is no known workaround at this time.
Resolution
All MediaWiki 1.23 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.