BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at httpclient.execute since the software no longer has to follow it when using finalUrl. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Bigbluebutton | Bigbluebutton | * | 2.6.12 (excluding) |
| Bigbluebutton | Bigbluebutton | 2.7.0-alpha1 (including) | 2.7.0-alpha1 (including) |
| Bigbluebutton | Bigbluebutton | 2.7.0-alpha2 (including) | 2.7.0-alpha2 (including) |
| Bigbluebutton | Bigbluebutton | 2.7.0-alpha3 (including) | 2.7.0-alpha3 (including) |
| Bigbluebutton | Bigbluebutton | 2.7.0-beta1 (including) | 2.7.0-beta1 (including) |
| Bigbluebutton | Bigbluebutton | 2.7.0-beta2 (including) | 2.7.0-beta2 (including) |
| Bigbluebutton | Bigbluebutton | 2.7.0-beta3 (including) | 2.7.0-beta3 (including) |