CVE-2025-54411

Discourse welcome banner user name XSS

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.

Category

2.4
CVSS
Severity: Low
CVSS 4.0 •
EPSS 0.02%
Affected: discourse discourse
Published at:
Updated at:

References

Link Tags
https://github.com/discourse/discourse/security/advisories/GHSA-5mm6-j5vq-6884
https://github.com/discourse/discourse/commit/a3374d2850f07444d113216e1d539ee21650dbff

Frequently Asked Questions

What is the severity of CVE-2025-54411?
CVE-2025-54411 has been scored as a low severity vulnerability.
How to fix CVE-2025-54411?
To fix CVE-2025-54411, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-54411 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-54411 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-54411?
CVE-2025-54411 affects discourse discourse.
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