Cross-site request forgery (CSRF) vulnerability in addressbook/register/delete_user.php in PHP Address Book 8.2.5 allows remote attackers to hijack the authentication of administrators for requests that delete accounts, a different vulnerability than CVE-2013-0135.1.
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.