Apache OpenMeetings 1.0.0 doesn't check contents of files being uploaded. An attacker can cause a denial of service by uploading multiple large files to the server.

Apache OpenMeetings 1.0.0 updates user password in insecure manner.

Apache OpenMeetings 1.0.0 has an overly permissive crossdomain.xml file. This allows for flash content to be loaded from untrusted domains.

Apache OpenMeetings 1.0.0 is vulnerable to Cross-Site Request Forgery (CSRF) attacks, XSS attacks, click-jacking, and MIME based attacks.

Apache OpenMeetings 1.0.0 is vulnerable to SQL injection. This allows authenticated users to modify the structure of the existing query and leak the structure of other queries being made by the application in the back-end.

Apache OpenMeetings 1.0.0 displays Tomcat version and detailed error stack trace, which is not secure.

In Apache OpenMeetings 3.0.0 - 4.0.1, CRUD operations on privileged users are not password protected allowing an authenticated attacker to deny service for privileged users.

Apache OpenMeetings 1.0.0 responds to the following insecure HTTP methods: PUT, DELETE, HEAD, and PATCH.

Apache OpenMeetings 1.0.0 uses not very strong cryptographic storage, captcha is not used in registration and forget password dialogs and auth forms missing brute force protection.