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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| laurent22 | joplin | < 3.3.3 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Joplin 3.3.3 Server - Privilege Escalation http/cves/2025/CVE-2025-27134.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.