Janek Vind has discovered a vulnerability in WordPress, which can be exploited by malicious people to conduct SQL injection attacks.
Input passed to the "cookie" parameter in wp-admin/admin-ajax.php is not properly sanitised before being used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.
Successful exploitation allows e.g. retrieving administrator password hashes, but requires knowledge of the database table prefix.
The vulnerability is confirmed in version 2.1.3. Prior versions may also be affected.
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Subject: WordPress "admin-ajax.php" SQL Injection
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