Secunia

James Bercegay has reported some vulnerabilities in Wordpress, which can be exploited by malicious people to manipulate mail messages, conduct cross-site scripting and SQL injection attacks, and by malicious users to compromise a vulnerable system.

1) Input passed to the "comment" and "p" parameters in "post.php" isn't properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in an administrator's browser session in context of an affected site.

2) Some input passed via the XML-RPC interface isn't properly sanitised before being used in a SQL query. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

3) Input passed to the "message" parameter in "wp-login.php" isn't properly verified before it is used. This can be exploited to manipulate the message content of the mail sent via the "Forgotten Password" feature.

Successful exploitation requires that "register_globals" is enabled.

4) An input validation error in the administration section can be exploited to inject arbitrary PHP code into existing plugins.

Successful exploitation requires administrative privileges.

It is also possible to disclose the full path to certain scripts by accessing them with invalid input.

The vulnerabilities have been reported in version 1.5.1.2 and prior.

Solution
Update to version 1.5.1.3.
Further details available in Customer Area

Provided and/or discovered by
James Bercegay, GulfTech Security Research Team

Changelog
Further details available in Customer Area

Original Advisory
http://www.gulftech.org/?node=research&article_id=00085-06282005

Deep Links
Links available in Customer Area