---
cve: "CVE-2026-33428"
severity: "MEDIUM"
cvss: 4.9
epss: "27%"
vendor: "discourse"
kev: false
exploited: false
published: "2026-03-21 00:16:27"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T05:16:47+02:00"
---

# CVE-2026-33428

> 4.9 MEDIUM · 🧪 PoC

## Beschreibung

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a non-staff user with elevated group membership could access deleted posts belonging to any user due to an overly broad authorization check on the deleted posts index endpoint. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 808b2ac23d8ff421563b40203091026732471c60 (Commit)
- f38464e46df1b8c51f7d60826502476908d6bb2b (Commit)

## Referenzen

- <https://github.com/discourse/discourse/security/advisories/GHSA-frcw-p4mc-x6mp>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-33428) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_