All In One SEO Pack Plugin for WordPress contains a flaw that allows a stored cross-site scripting (XSS) attack. This flaw exists because the /wp-admin/post.php script does not validate input to the ‘aiosp_menulabel’ form field before returning it to users. This may allow a remote attacker to create a specially crafted request that would execute arbitrary script code in a user’s browser session within the trust relationship between their browser and the server.