CVE-2025-58054

Discourse is vulnerable to XSS when quoting chat messages

State: Published
Severity: 3.5 Low
Published: Oct 1, 2025
Updated: Oct 1, 2025
Reserved: Aug 22, 2025

Description

Discourse is an open-source community discussion platform. Versions 3.5.0 and below are vulnerable to XSS attacks through parsing and rendering of chat channel titles and chat thread titles via the quote message functionality when using the rich text editor. This issue is fixed in version 3.5.1.

Scores

CVSS	Score	Vector	Source
3.1	3.5 Low	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Affected Products

Product	Versions
discoursediscourse	< 3.5.1Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-7p47-8m82-m2vf
https://github.com/discourse/discourse/commit/3a224fd546d894ee408e7414b6879e814a792f91

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