------------------------------------------------------------------------ Admin Custom Login WordPress plugin affected by persistent Cross-Site Scripting via Logo URL field ------------------------------------------------------------------------ Burak Kelebek, July 2016 ------------------------------------------------------------------------ Abstract ------------------------------------------------------------------------ A persistent Cross-Site Scripting vulnerability has been encountered in the Admin Custom Login WordPress plugin. This issue allows an attacker to perform a wide variety of actions, such as stealing Administrators' session tokens, or performing arbitrary actions on their behalf. The "logo_url" field does not validate "/> After this request is executed, re-open the admin panel of WordPress and visit the Admin Custom Login page. ------------------------------------------------------------------------ Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its goal is to contribute to the security of popular, widely used OSS projects in a fun and educational way.