CVE-2025-58054

Name: CVE-2025-58054
Creator: NVD / NIST
Published: 2025-10-01T19:15:36.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2025-58054 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS Probability

0.18%

8.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-80

Affected Software

Vendor	Product	Versions	Update
Discourse	Discourse	< 3.5.0	—
Discourse	Discourse	< 3.6.0	—
Discourse	Discourse	3.6.0	Beta1

References

Timeline

Published: Oct 1, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-58054?

How severe is CVE-2025-58054?

CVE-2025-58054 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2025-58054?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-58054?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST