Multiple cross-site request forgery (CSRF) vulnerabilities in OpenX 2.8.11 and earlier allow remote attackers to hijack the authentication of administrators for requests that delete (1) users via admin/agency-user-unlink.php (2) advertisers via admin/advertiser-delete.php (3) banners via admin/banner-delete.php (4) campaigns via admin/campaign-delete.php (5) channels via admin/channel-delete.php (6) affiliate websites via admin/affiliate-delete.php or (7) zones via admin/zone-delete.php.