CVE-2021-41163

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

Discourse is an open source platform for community discussion. In affected versions maliciously crafted requests could lead to remote code execution. This resulted from a lack of validation in subscribe_url values. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. To workaround the issue without updating, requests with a path starting /webhooks/aws path could be blocked at an upstream proxy.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-74

Affected software

Vendor	Product	Versions
discourse	discourse	tests-passed < 2.8.0.beta7; beta < 2.8.0.beta7; stable < 2.7.9

References

https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwqThird Party Advisory
https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwqThird Party Advisory

Timeline

Published: Oct 20, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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