WordPress is a PHP and MySQL based content management and publishing system.
Due to a lack of input validation, WordPress is vulnerable to SQL injection and XSS attacks.
An attacker could use the SQL injection vulnerabilities to gain information from the database. Furthermore the cross-site scripting issues give an attacker the ability to inject and execute malicious script code or to steal cookie-based authentication credentials, potentially compromising the victim's browser.
There is no known workaround at this time.
All Wordpress users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apps/wordpress-1.5.1.2"