Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches, the embedding feature is susceptible to server side request forgery. The issue is patched in version 3.1.3 of the stable branch and version 3.2.0.beta3 of the beta and tests-passed branches. As a workaround, disable the Embedding feature.
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 |
|---|---|---|---|
| Discourse | Discourse | * | 3.1.3 (excluding) |
| Discourse | Discourse | * | 3.2.0 (excluding) |
| Discourse | Discourse | 3.2.0-beta1 (including) | 3.2.0-beta1 (including) |
| Discourse | Discourse | 3.2.0-beta2 (including) | 3.2.0-beta2 (including) |