Description
Discourse is an open-source discussion platform. Prior to version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches, a maliciously crafted URL can be included in a user's full name field to to carry out cross-site scripting attacks on sites with a disabled or overly permissive CSP (Content Security Policy). Discourse's default CSP prevents this vulnerability. The vulnerability is patched in version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches. As a workaround, enable and/or restore your site's CSP to the default one provided with Discourse.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| discourse | discourse | stable < 3.0.1; beta < 3.1.0.beta2; tests-passed < 3.1.0.beta2 |
References
- https://github.com/discourse/discourse/commit/1a5a6f66cb821ed29a737311d6fdc2eba5adc915Patch
- https://github.com/discourse/discourse/commit/c186a46910431020e8efc425dec2133e7a99fa9aPatch
- https://github.com/discourse/discourse/pull/20008Patch
- https://github.com/discourse/discourse/pull/20009Patch
- https://github.com/discourse/discourse/security/advisories/GHSA-7pm2-prxw-wrvpVendor Advisory
- https://github.com/discourse/discourse/commit/1a5a6f66cb821ed29a737311d6fdc2eba5adc915Patch
- https://github.com/discourse/discourse/commit/c186a46910431020e8efc425dec2133e7a99fa9aPatch
- https://github.com/discourse/discourse/pull/20008Patch
- https://github.com/discourse/discourse/pull/20009Patch
- https://github.com/discourse/discourse/security/advisories/GHSA-7pm2-prxw-wrvpVendor Advisory
Timeline
- Published
- Mar 17, 2023
- Last modified
- Jun 17, 2026
- NVD status
- Modified