Discourse is an open-source discussion platform. In stable versions prior to 2.8.12 and beta or tests-passed versions prior to 2.9.0.beta.13, under certain conditions, a user can see notifications for topics they no longer have access to. If there is sensitive information in the topic title, it will therefore have been exposed. This issue is patched in stable version 2.8.12, beta version 2.9.0.beta13, and tests-passed version 2.9.0.beta13. There are no workarounds available.
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Discourse | Discourse | * | 2.8.11 (including) |
Discourse | Discourse | 2.9.0-beta1 (including) | 2.9.0-beta1 (including) |
Discourse | Discourse | 2.9.0-beta10 (including) | 2.9.0-beta10 (including) |
Discourse | Discourse | 2.9.0-beta11 (including) | 2.9.0-beta11 (including) |
Discourse | Discourse | 2.9.0-beta12 (including) | 2.9.0-beta12 (including) |
Discourse | Discourse | 2.9.0-beta2 (including) | 2.9.0-beta2 (including) |
Discourse | Discourse | 2.9.0-beta3 (including) | 2.9.0-beta3 (including) |
Discourse | Discourse | 2.9.0-beta4 (including) | 2.9.0-beta4 (including) |
Discourse | Discourse | 2.9.0-beta5 (including) | 2.9.0-beta5 (including) |
Discourse | Discourse | 2.9.0-beta6 (including) | 2.9.0-beta6 (including) |
Discourse | Discourse | 2.9.0-beta7 (including) | 2.9.0-beta7 (including) |
Discourse | Discourse | 2.9.0-beta8 (including) | 2.9.0-beta8 (including) |
Discourse | Discourse | 2.9.0-beta9 (including) | 2.9.0-beta9 (including) |
Assuming a user with a given identity, authorization is the process of determining whether that user can access a given resource, based on the user’s privileges and any permissions or other access-control specifications that apply to the resource. When access control checks are incorrectly applied, users are able to access data or perform actions that they should not be allowed to perform. This can lead to a wide range of problems, including information exposures, denial of service, and arbitrary code execution.