CVE-2026-42562

HIGH

Plainpad: Privilege Escalation via Writable Admin Field in Profile Update (Access Control)

Title source: cna
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 8.3
EPSS 0.0026
EPSS Percentile 17.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-269
Status published
Products (1)
alextselegidis/plainpad < 1.1.1
Published May 09, 2026
Tracked Since May 10, 2026