---
cve: "CVE-2021-41163"
severity: "CRITICAL"
cvss: 10.0
epss: "19.8%"
vendor: "discourse"
kev: false
exploited: false
published: "2021-10-20 22:30:14"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T00:23:02+02:00"
---

# CVE-2021-41163

> 10.0 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- a1dcf3a50cdc69a33e7174eb23e2415fc32de79f (Commit)
- fa3c46cf079d28b086fe1025349bb00223a5d5e9 (Commit)

## Referenzen

- <https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwq>
- <https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-41163) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_