laurent22 joplin up to 3.3.2 API Endpoint /api/users/:id is_admin access control

Summaryinfo

A vulnerability categorized as critical has been discovered in laurent22 joplin up to 3.3.2. This vulnerability affects unknown code of the file /api/users/:id of the component API Endpoint. Such manipulation of the argument is_admin with the input 1 leads to access control. This vulnerability is referenced as CVE-2025-27134. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in laurent22 joplin up to 3.3.2. Affected by this issue is an unknown functionality of the file /api/users/:id of the component API Endpoint. The manipulation of the argument is_admin with the input value 1 leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2025-27134 since 02/19/2025. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 3.3.3 eliminates this vulnerability. Applying the patch 12baa9827dac9da903f244c9f358e3deb264e228 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• laurent22

Name

• joplin

Version

• 3.3.0
• 3.3.1
• 3.3.2

License

• open-source

Website

• Product: https://github.com/laurent22/joplin/

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