---
cve: "CVE-2023-23621"
severity: "HIGH"
cvss: 8.6
epss: "87%"
vendor: "discourse"
kev: false
exploited: false
published: "2023-01-28 00:15:09"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T18:08:13+02:00"
---

# CVE-2023-23621

> 8.6 HIGH · 🧪 PoC

## Beschreibung

Discourse is an open-source discussion platform. Prior to version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches, a malicious user can cause a regular expression denial of service using a carefully crafted user agent. This issue is patched in version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches. There are no known workarounds.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/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 | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 4571b10ee5a3c46249271b2870d6eaf37994460f (Commit)
- 6d92c3cbdac431db99a450f360a3048bb3aaf458 (Commit)

## Referenzen

- <https://github.com/discourse/discourse/security/advisories/GHSA-mrfp-54hf-jrcv>
- <https://github.com/discourse/discourse/pull/20002>
- <https://github.com/discourse/discourse/commit/6d92c3cbdac431db99a450f360a3048bb3aaf458>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-23621) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_