CVE-2026-42562
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.
SeverityHigh
CVSS8.3
Exploit probability—
ProductAlextselegidis Plainpad
PublishedMay 9, 2026
First seenMay 9, 2026
Weakness typeCWE-269Improper privilege management
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| alextselegidis plainpad | < 1.1.1 | — |
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