Cross-site request forgery (CSRF) vulnerability in ownCloud before 3.0.3 allows remote attackers to hijack the authentication of arbitrary users for requests that insert cross-site scripting (XSS) sequences via vectors involving contacts.
Cross-Site Request Forgery 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.