EUVD-2026-14529
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Tags
Description
Blinko is an AI-powered card note-taking project. Prior to version 1.8.4, there is a privilege escalation vulnerability. The upsertUser endpoint has 3 issues: it is missing superAdminAuthMiddleware, any logged-in user can call it; the originalPassword is an optional parameter and if not provided password verification is skipped; there is no check for input.id === ctx.id (ownership verification). This could result in any authenticated user modifying other users' passwords, direct escalation to superadmin, and complete account takeover. This issue has been patched in version 1.8.4.
Analysis
Blinko versions prior to 1.8.4 contain a critical privilege escalation vulnerability in the upsertUser endpoint that allows any authenticated user to modify other users' passwords and escalate to superadmin privileges. The vulnerability stems from three distinct authorization and input validation flaws: missing superAdminAuthMiddleware enforcement, optional password verification, and absent ownership checks. …
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Remediation
Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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