Vulnerability Description
Plainpad is a self hosted note taking app. Prior to version 1.1.1, Plainpad allows a low-privilege authenticated user to self-escalate to administrator by submitting admin=true in PUT /api.php/v1/users/{id}. The endpoint directly persists the admin attribute from user input, and the escalated account can immediately access admin-only routes. This issue has been patched in version 1.1.1.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d80
- https://github.com/alextselegidis/plainpad/issues/138
- https://github.com/alextselegidis/plainpad/releases/tag/1.1.1
- https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6
FAQ
What is CVE-2026-42562?
CVE-2026-42562 is a vulnerability with a CVSS score of 8.3 (HIGH). Plainpad is a self hosted note taking app. Prior to version 1.1.1, Plainpad allows a low-privilege authenticated user to self-escalate to administrator by submitting admin=true in PUT /api.php/v1/user...
How severe is CVE-2026-42562?
CVE-2026-42562 has been rated HIGH with a CVSS base score of 8.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42562?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.