The Encyclopedia gianthas been found vulnerable to remote code execution because of a critical flaw in the MediaWiki software. The vulnerability might have caused Wikipedia’s web servers a malicious content distributor, if left uncovered. This is the 3rd’remote code execution’ vulnerability reported in MediaWiki Platform, since 2006. Check Point’s Vulnerability Research Group assesses common software to ensure the security of Internet users. An update was released from the WikiMedia Foundation after knowing about the vulnerability from Check Point.
Source: https://thehackernews.com/2014/01/mediawiki-remote-code-execution.html