CVE-2025-54411

Name: CVE-2025-54411
Creator: NVD / NIST
Published: 2025-08-19T17:15:40.833+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.4/10EPSS 0.19%

Last modified Jun 17, 2026

CVE-2025-54411 is a low-severity vulnerability rated 2.4/10 on the CVSS scale. Discourse is an open-source discussion platform. Welcome banner user name string for logged in users can be vulnerable to XSS attacks, which affect the user themselves or an admin impersonating them. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

Description

Discourse is an open-source discussion platform. Welcome banner user name string for logged in users can be vulnerable to XSS attacks, which affect the user themselves or an admin impersonating them. Admins can temporarily alter the welcome_banner.header.logged_in_members site text to remove the preferred_display_name placeholder, or not impersonate any users for the time being. This vulnerability is fixed in 3.5.0.beta8.

Metrics

CVSS 3.1

5.4/10

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

CVSS 4.0

2.4/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.19%

8.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

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

References

https://github.com/discourse/discourse/commit/a3374d2850f07444d113216e1d539ee21650dbffPatch
https://github.com/discourse/discourse/security/advisories/GHSA-5mm6-j5vq-6884Mitigation, Third Party Advisory

Timeline

Published: Aug 19, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-54411?

How severe is CVE-2025-54411?

CVE-2025-54411 has a CVSS score of 2.4/10 (LOW severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.

How do I fix CVE-2025-54411?

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-2025-54411?

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

Scan your code now

Source: NVD / NIST