CVE-2025-58054
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-01

Last updated on: 2025-10-23

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2025-10-01
Last Modified
2025-10-23
Generated
2026-06-16
AI Q&A
2025-10-01
EPSS Evaluated
2026-06-14
NVD
CVE-2025-58054
EUVD
EUVD-2025-33227
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
discourse discourse to 3.5.0 (exc)
discourse discourse to 3.6.0 (exc)
discourse discourse 3.6.0
Helpful Resources
Exploitability
CWE
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KEV
KEV Icon
CWE ID Description
CWE-80 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.
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Executive Summary

This vulnerability affects Discourse versions 3.5.0 and below, allowing cross-site scripting (XSS) attacks through the parsing and rendering of chat channel titles and chat thread titles when using the quote message functionality with the rich text editor. It means that an attacker could inject malicious scripts into these titles, which would then be executed in the context of other users viewing them. The issue is fixed in version 3.5.1.

Impact Analysis

The vulnerability can lead to cross-site scripting attacks, which may allow attackers to execute malicious scripts in the browsers of users interacting with the affected chat titles. This could result in unauthorized actions performed on behalf of users, theft of session tokens, or other malicious activities. However, the CVSS score indicates a low severity with limited impact on confidentiality and no impact on integrity or availability.

Mitigation Strategies

Upgrade Discourse to version 3.5.1 or later, as this version contains the fix for the XSS vulnerability related to chat channel and thread titles when using the rich text editor.

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