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CVE-2021-41163 Details

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.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:10 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9	CVE	PatchThird Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwq	CVE	Third Party Advisory
https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9	[email protected]	PatchThird Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwq	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-74	Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')	[email protected]
CWE-74	Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')	[email protected]

Affected Products

Product	Versions
discourse discourse	< 2.7.9 2.8.0 beta1 2.8.0 beta2 2.8.0 beta3 2.8.0 beta4
CPE cpe:2.3:a:discourse:discourse:::::::: cpe:2.3:a:discourse:discourse:2.8.0:beta1:::::: cpe:2.3:a:discourse:discourse:2.8.0:beta2:::::: cpe:2.3:a:discourse:discourse:2.8.0:beta3:::::: cpe:2.3:a:discourse:discourse:2.8.0:beta4:::::: cpe:2.3:a:discourse:discourse:2.8.0:beta5:::::: cpe:2.3:a:discourse:discourse:2.8.0:beta6:::::: Remediation No remediation found in references.

Product

Versions

discourse discourse

< 2.7.9

2.8.0 beta1

2.8.0 beta2

2.8.0 beta3

2.8.0 beta4

CPE

cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:*
cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:*

Remediation

No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 24, 2022	Reanalysis	[email protected]
Oct 26, 2021	Initial Analysis	[email protected]