CVE-2025-27134HIGH 8.8EPSS p74.3%

CVE-2025-27134CVE-2025-27134

Description

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.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS1.70% probability of exploitation · percentile 74.3% · 2026-06-19T12:03:05Z
Published2025-04-30
Last modified2025-05-16

Underlying weaknesses· 1

CWE-284

References

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

1

TypeTargetConfidenceTier
WeaknessImproper Access Controlcwe-2840%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.