Timing Attack Vulnerability in MediaWiki's ApiBase::getWatchlistUser Function

CVE-2015-6728 · HIGH Severity

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

The ApiBase::getWatchlistUser function in MediaWiki before 1.23.10, 1.24.x before 1.24.3, and 1.25.x before 1.25.2 does not perform token comparison in constant time, which allows remote attackers to guess the watchlist token and bypass CSRF protection via a timing attack.

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