Is CVE-2025-27134 actively exploited?

No active exploitation of CVE-2025-27134 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-27134 be exploited remotely?

Yes. CVE-2025-27134 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-27134?

CVE-2025-27134 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2025-27134

CWE-284Published: April 30, 2025· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-27134 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.