CVE-2025-48877

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, Codepen is present in the default `allowed_iframes` site setting, and it can potentially auto-run arbitrary JS in the iframe scope, which is unintended. 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. As a workaround, the Codepen prefix can be removed from a site's `allowed_iframes`.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/discourse/discourse/security/advisories/GHSA-cm93-6m2m-cjcv	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

No history.

Information

Published : 2025-06-09 13:15

Updated : 2025-09-25 20:27

NVD link : CVE-2025-48877

Mitre link : CVE-2025-48877

CVE.ORG link : CVE-2025-48877

JSON object : View

Products Affected

discourse

discourse

CWE

CWE-1038

Insecure Automated Optimizations

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