CVE-2026-42562HIGH 8.3EPSS p17.2%

CVE-2026-42562CVE-2026-42562

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.

Scoring

CVSS 3.18.3 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
EPSS0.26% probability of exploitation · percentile 17.2% · 2026-06-19T12:03:05Z
Published2026-05-09
Last modified2026-05-13

Underlying weaknesses· 1

CWE-269

References

  1. https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d803f7cb075fc
  2. https://github.com/alextselegidis/plainpad/issues/138
  3. https://github.com/alextselegidis/plainpad/releases/tag/1.1.1
  4. https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6f6

1

TypeTargetConfidenceTier
WeaknessImproper Privilege Managementcwe-2690%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.