Description
Discourse is an open source platform for community discussion. Without a rate limit on the POST /uploads endpoint, it makes it easier for an attacker to carry out a DoS attack on the server since creating an upload can be a resource intensive process. Do note that the impact varies from site to site as various site settings like `max_image_size_kb`, `max_attachment_size_kb` and `max_image_megapixels` will determine the amount of resources used when creating an upload. The issue is patched in the latest stable, beta and tests-passed version of Discourse. Users are advised to upgrade. Users unable to upgrade should reduce `max_image_size_kb`, `max_attachment_size_kb` and `max_image_megapixels` as smaller uploads require less resources to process. Alternatively, `client_max_body_size` can be reduced in Nginx to prevent large uploads from reaching the server.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| discourse | discourse | stable <= 3.2.0; beta < 3.3.0.beta1; tests-passed < 3.3.0.beta1 |
| discourse | discourse | >= stable, < 3.2.0; >= beta, < 3.3.0beta1; >= tests_passed, < 3.3.0beta1 |
References
- https://github.com/discourse/discourse/commit/003b80e62f97cd8c0114d6b9d3f93c10443e6faePatch
- https://github.com/discourse/discourse/security/advisories/GHSA-58vw-246g-fjj4Third Party Advisory
- https://github.com/discourse/discourse/commit/003b80e62f97cd8c0114d6b9d3f93c10443e6faePatch
- https://github.com/discourse/discourse/security/advisories/GHSA-58vw-246g-fjj4Third Party Advisory
Timeline
- Published
- Mar 15, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed