CVE-2025-68659
Published: Jan 28, 2026
Modified: Jan 28, 2026
CVSS v3.1
4.3
Description
Discourse is an open source discussion platform. Versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 have an application level denial of service vulnerabilityin the username change functionality at try.discourse.org. The vulnerability allows attackers to cause noticeable server delays and resource exhaustion by sending large JSON payloads to the username preference endpoint PUT /u//preferences/username, resulting in degraded performance for other users and endpoints. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. No known workarounds are available.
| Vendor | Product | Versions |
|---|---|---|
discourse | discourse | affected < 3.5.4affected >= 2025.11.0-latest, < 2025.11.2affected >= 2025.12.0-latest, < 2025.12.1affected >= 2026.1.0-latest, < 2026.1.0 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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