SB2025043046 - Improper access control in Joplin Server
Published: April 30, 2025 Updated: May 26, 2026
Security Bulletin ID
SB2025043046
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2025-27134)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to escalate privileges.
The vulnerability exists due to improper access control in the PATCH /api/users/:id endpoint when handling crafted API requests to update user attributes. A remote user can send a specially crafted request to escalate privileges.
The issue allows a non-admin user to set the is_admin field to 1 for their own account.
Remediation
Install update from vendor's website.