wp-admin/admin-functions.php in Wordpress before 2.2.3 and Wordpress multi-user (MU) before 1.2.5a does not properly verify the unfiltered_html privilege, which allows remote attackers to conduct cross-site scripting (XSS) attacks via modified data to (1) post.php or (2) page.php with a no_filter field.

References

• https://nvd.nist.gov/vuln/detail/CVE-2007-4893
• https://bugzilla.redhat.com/show_bug.cgi?id=285831
• https://exchange.xforce.ibmcloud.com/vulnerabilities/36576
• http://fedoranews.org/updates/FEDORA-2007-214.shtml
• http://secunia.com/advisories/26771
• http://secunia.com/advisories/26796
• http://trac.wordpress.org/ticket/4720
• http://wordpress.org/development/2007/09/wordpress-223/
• http://www.securityfocus.com/bid/25639
• http://www.vupen.com/english/advisories/2007/3132