Hello, I wanted to announce a Pomcor white paper that looks at attacks through HTML shared files in Web applications and proposes a countermeasure. These are essentially XSS attacks, but the usual defenses against XSS are typically not available, because shared files cannot be sanitized. The paper is available at: http://www.pomcor.com/whitepapers/file_sharing_security.pdf I have not been able to find much prior work. What I've found is discussed in Section 2 of the paper. If I've missed something, please let me know. Thanks, Francisco Corella