MediaWiki is prone to the following security vulnerabilities:
1. Multiple cross-site scripting vulnerabilities 2. Multiple information-disclosure vulnerabilities 3. Multiple security-bypass vulnerabilities 4. An HTML-injection vulnerability 5. A denial-of-service vulnerability 6. A buffer-overflow vulnerability 7. A cross-site request forgery vulnerability
Attackers can exploit this issue using a browser or readily available tools.
Solution: updates are available. Please see the references or vendor advisory for more information.