Cross-Site Scripting (XSS) Vulnerability in MediaWiki's checkCss Function

CVE-2011-1579 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:P/A:N

The checkCss function in includes/Sanitizer.php in the wikitext parser in MediaWiki before 1.16.3 does not properly validate Cascading Style Sheets (CSS) token sequences, which allows remote attackers to conduct cross-site scripting (XSS) attacks or obtain sensitive information by using the \2f\2a and \2a\2f hex strings to surround CSS comments.

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