PT-2026-39406 · Plainpad · Plainpad

Qiaonpc · Published 2026-05-09 · Updated 2026-05-09 · CVE-2026-42562

Positive Technologies (AI Summary)

CVSS v3.1

8.3

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Plainpad versions prior to 1.1.1

Description Plainpad allows a low-privilege authenticated user to escalate their privileges to administrator. This occurs because the endpoint "/api.php/v1/users/{id}" directly persists the admin attribute from user input. By submitting admin=true via a PUT request to this endpoint, a user can gain immediate access to administrator-only routes.

Recommendations Update to version 1.1.1.

Fix

LPE

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2026-42562

Affected Products

Plainpad

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-42562 · Security Note
• https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d803f7cb075fc · Note
• https://github.com/alextselegidis/plainpad/releases/tag/1.1.1 · Note
• https://github.com/alextselegidis/plainpad/issues/138 · Note
• https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6f6 · Note
• https://t.me/CVEtracker/53228 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2053239472783867985 · Twitter Post