CVE-2026-42562— Plainpad: Privilege Escalation via Writable Admin Field in Profile Update (Access Control)
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I. Basic Information for CVE-2026-42562
Vulnerability Information
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Vulnerability Title
Plainpad: Privilege Escalation via Writable Admin Field in Profile Update (Access Control)
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权管理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Plainpad 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Plainpad是Alex Tselegidis个人开发者的一款自托管的笔记应用。 Plainpad 1.1.1之前版本存在安全漏洞，该漏洞源于允许低权限用户通过PUT请求中的admin参数自提升为管理员，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| alextselegidis | plainpad | < 1.1.1 | - |
II. Public POCs for CVE-2026-42562
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 12939 chars
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III. Intelligence Information for CVE-2026-42562
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- Release 1.1.1 · alextselegidis/plainpad · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-42562
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V. Comments for CVE-2026-42562
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