Cross-site request forgery (CSRF) vulnerability in e107_admin/users_extended.php in e107 before 0.7.26 allows remote attackers to hijack the authentication of administrators for requests that insert cross-site scripting (XSS) sequences via the user_include parameter.
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.