CVE-2025-58054

LOW

Discourse < 3.5.1 - Stored Cross-Site Scripting via Chat Channel and Thread Title Quote

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 3.5
EPSS 0.0019
EPSS Percentile 8.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-80
Status published
Products (3)
discourse/discourse 3.6.0 beta1
discourse/discourse < 3.5.0
discourse/discourse < 3.6.0
Published Oct 01, 2025
Tracked Since Feb 18, 2026