Privilege escalation in Alextselegidis Plainpad
CVE-2026-42562
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…
Vulnerability class: Privilege Escalation
EPSS: 0.000 (13.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.
Affected products
- Alextselegidis Plainpad — versions < 1.1.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-42562?
- CVE-2026-42562 is a high-severity vulnerability in Alextselegidis Plainpad, classified under Improper Privilege Management. CVSS score: 8.3/10. Published 2026-05-09.
- How severe is CVE-2026-42562?
- High severity. CVSS v3 base score is 8.3 out of 10.