CVE-2025-24808

Discourse is an open-source discussion platform. Prior to versions `3.3.4` on the `stable` branch and `3.4.0.beta5` on the `beta` branch, someone who is about to reach the limit of users in a group DM may send requests to add new users in parallel. The requests might all go through ignoring the limit due to a race condition. The patch in versions `3.3.4` and `3.4.0.beta5` uses the `lock` step in service to wrap part of the `add_users_to_channel` service inside a distributed lock/mutex in order to avoid the race condition.

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 LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/discourse/discourse/commit/a16b2f224860f6678f89f5ffa012f0ede17e4095	Patch
https://github.com/discourse/discourse/security/advisories/GHSA-hfcx-qjw6-573r	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:discourse:discourse:::::stable:::*
	cpe:2.3:a:discourse:discourse:::::beta:::*
	cpe:2.3:a:discourse:discourse:3.4.0:beta1:::beta:::*
	cpe:2.3:a:discourse:discourse:3.4.0:beta2:::beta:::*
	cpe:2.3:a:discourse:discourse:3.4.0:beta3:::beta:::*
	cpe:2.3:a:discourse:discourse:3.4.0:beta4:::beta:::*

History

06 Nov 2025, 22:05

Type	Values Removed	Values Added
References	~~() https://github.com/discourse/discourse/security/advisories/GHSA-hfcx-qjw6-573r - Third Party Advisory~~	() https://github.com/discourse/discourse/security/advisories/GHSA-hfcx-qjw6-573r - Vendor Advisory

Information

Published : 2025-03-26 14:15

Updated : 2025-11-06 22:05

NVD link : CVE-2025-24808

Mitre link : CVE-2025-24808

CVE.ORG link : CVE-2025-24808

JSON object : View

Products Affected

discourse

discourse

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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