---
cve: "CVE-2025-27134"
severity: "HIGH"
cvss: 8.8
epss: "2.1%"
vendor: "laurent22"
kev: false
exploited: false
published: "2025-04-30 15:16:00"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T00:38:19+02:00"
---

# CVE-2025-27134

> 8.8 HIGH · 🧪 PoC

## Beschreibung

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. Prior to version 3.3.3, a privilege escalation vulnerability exists in the Joplin server, allowing non-admin users to exploit the API endpoint `PATCH /api/users/:id` to set the `is_admin` field to 1. The vulnerability allows malicious low-privileged users to perform administrative actions without proper authorization. This issue has been patched in version 3.3.3.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 23254e6ffd95ed36ca4ad9afa1ae1c72477b2d32 (Commit)
- 12baa9827dac9da903f244c9f358e3deb264e228 (Commit)

## Referenzen

- <https://github.com/laurent22/joplin/security/advisories/GHSA-xj67-649m-3p8x>
- <https://github.com/laurent22/joplin/commit/12baa9827dac9da903f244c9f358e3deb264e228>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-27134) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_