CVE-2023-23935
Discourse is an open-source messaging platform.
Impact
Discourse is an open-source messaging platform. In versions 3.0.1 and prior on the `stable` branch and versions 3.1.0.beta2 and prior on the `beta` and `tests-passed` branches, the count of personal messages displayed for a tag is a count of all personal messages regardless of whether the personal message is visible to a given user. As a result, any users can technically poll a sensitive tag to determine if a new personal message is created even if the user does not have access to the personal message. In the patched versions, the count of personal messages tagged with a given tag is hidden by default. To revert to the old behaviour of displaying the count of personal messages for a given tag, an admin may enable the `display_personal_messages_tag_counts` site setting.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Discourse | Discourse | before 3.0.1 Versions 1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/discourse/discourse/commit/f31f0b70f82c43d93220ce6fc0d4f57440452f37
- https://github.com/discourse/discourse/security/advisories/GHSA-rf8j-mf8c-82v7
- https://github.com/discourse/discourse/commit/f31f0b70f82c43d93220ce6fc0d4f57440452f37
- https://github.com/discourse/discourse/security/advisories/GHSA-rf8j-mf8c-82v7