CVE-2025-68659

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

D

iscourse 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.

References

Link	Resource
https://github.com/discourse/discourse/security/advisories/GHSA-rmp6-c9rq-6q7p	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:discourse:discourse:::::stable:::*
	cpe:2.3:a:discourse:discourse:::::stable:::*
	cpe:2.3:a:discourse:discourse:2025.12.0::::stable:::
	cpe:2.3:a:discourse:discourse:2026.1.0::::stable:::

History

30 Jan 2026, 20:44

Type	Values Removed	Values Added
First Time		Discourse discourse Discourse
CPE		cpe:2.3:a:discourse:discourse:::::stable:::* cpe:2.3:a:discourse:discourse:2026.1.0::::stable::: cpe:2.3:a:discourse:discourse:2025.12.0::::stable:::
References	~~() https://github.com/discourse/discourse/security/advisories/GHSA-rmp6-c9rq-6q7p -~~	() https://github.com/discourse/discourse/security/advisories/GHSA-rmp6-c9rq-6q7p - Third Party Advisory

28 Jan 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-28 19:16

Updated : 2026-01-30 20:44

NVD link : CVE-2025-68659

Mitre link : CVE-2025-68659

CVE.ORG link : CVE-2025-68659

JSON object : View

Products Affected

discourse

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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