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CVE

CWE

Training

CVE-2026-42562

Published: May 9, 2026

Modified: May 11, 2026

PUBLISHED

CVSS v3.1

8.3

HIGH

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.

Vendor	Product	Versions
alextselegidis	plainpad	affected `< 1.1.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

References

https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6f6

x_refsource_CONFIRM

https://github.com/alextselegidis/plainpad/issues/138

x_refsource_MISC

https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d803f7cb075fc

x_refsource_MISC

https://github.com/alextselegidis/plainpad/releases/tag/1.1.1

x_refsource_MISC

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