CVE-2025-48053

Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, sending a malicious URL in a PM to a bot user can cause a reduced the availability of a Discourse instance. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. No known workarounds are available.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/discourse/discourse/security/advisories/GHSA-3q5q-qmrm-rvwx	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:3.5.0:beta1:::beta:::*
	cpe:2.3:a:discourse:discourse:3.5.0:beta2:::beta:::*
	cpe:2.3:a:discourse:discourse:3.5.0:beta3:::beta:::*
	cpe:2.3:a:discourse:discourse:3.5.0:beta4:::beta:::*

History

25 Sep 2025, 20:27

Type	Values Removed	Values Added
First Time		Discourse Discourse discourse
CPE		cpe:2.3:a:discourse:discourse:3.5.0:beta4:::beta:::* cpe:2.3:a:discourse:discourse:::::stable:::* cpe:2.3:a:discourse:discourse:3.5.0:beta3:::beta:::* cpe:2.3:a:discourse:discourse:3.5.0:beta2:::beta:::* cpe:2.3:a:discourse:discourse:3.5.0:beta1:::beta:::* cpe:2.3:a:discourse:discourse:::::beta:::*
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/discourse/discourse/security/advisories/GHSA-3q5q-qmrm-rvwx -~~	() https://github.com/discourse/discourse/security/advisories/GHSA-3q5q-qmrm-rvwx - Vendor Advisory

12 Jun 2025, 16:06

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-06-09 13:15

Updated : 2025-09-25 20:27

NVD link : CVE-2025-48053

Mitre link : CVE-2025-48053

CVE.ORG link : CVE-2025-48053

JSON object : View

Products Affected

discourse

discourse

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-770

Allocation of Resources Without Limits or Throttling

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