---
cve: "CVE-2024-21641"
severity: "MEDIUM"
cvss: 6.5
epss: "1.1%"
vendor: "flarum"
kev: false
exploited: false
published: "2024-01-05 21:15:43"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T15:44:29+02:00"
---

# CVE-2024-21641

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

Flarum is open source discussion platform software. Prior to version 1.8.5, the Flarum `/logout` route includes a redirect parameter that allows any third party to redirect users from a (trusted) domain of the Flarum installation to redirect to any link. For logged-in users, the logout must be confirmed. Guests are immediately redirected. This could be used by spammers to redirect to a web address using a trusted domain of a running Flarum installation. The vulnerability has been fixed and published as flarum/core v1.8.5. As a workaround, some extensions modifying the logout route can remedy this issue if their implementation is safe.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3a (Commit)
- 2a693db1b65cf7b0f7e76cbaa695a5e65bd947f6 (Commit)

## Referenzen

- <https://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mr>
- <https://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3a>
- <https://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-21641) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_