Vulnerability Details : CVE-2021-41163
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.
Vulnerability category: Execute code
Products affected by CVE-2021-41163
- cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*
- 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:beta1:*:*:*:*:*:*
- 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:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-41163
1.46%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 87 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-41163
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST | |
|
10.0
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
3.9
|
6.0
|
GitHub, Inc. |
CWE ids for CVE-2021-41163
-
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2021-41163
-
https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9
SECURITY: Improve validation of SNS subscription confirm (#14672) · discourse/discourse@fa3c46c · GitHubPatch;Third Party Advisory
-
https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwq
RCE via malicious SNS subscription payload · Advisory · discourse/discourse · GitHubThird Party Advisory
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