Description
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, when the hidden prioritize_full_name_in_ux site setting is enabled (defaults to false, requires console access to change), user and group display names are rendered without HTML escaping in several assignment-related UI paths. This allows users with assign permission to inject arbitrary HTML/JavaScript that executes in the browser of any user viewing an affected topic. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/discourse/discourse/security/advisories/GHSA-xg68-q7ff-6gqm
X_Refsource_Misc x_refsource_misc
https://github.com/discourse/discourse/commit/46edb174e237c6e57bda9c494160da0a174fe70d
Scores
CVSS v3
5.4
EPSS
0.0017
EPSS Percentile
6.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (5)
discourse/discourse
2026.3.0 (2 CPE variants)
discourse/discourse
2026.1.0 - 2026.1.3
discourse/discourse
>= 2026.1.0-latest, < 2026.1.3
discourse/discourse
>= 2026.2.0-latest, < 2026.2.2
discourse/discourse
>= 2026.3.0-latest, < 2026.3.0
Published
Mar 31, 2026
Tracked Since
Mar 31, 2026