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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Blinko Blinko
cpe:2.3:a:blinko:blinko:*:*:*:*:*:*:*:*
|
— |
1.8.4
|
References 3
https://github.com/blinkospace/blinko/commit/3afbdf486b6f371bdac5781dea6289749f…
security-advisories@github.com
https://github.com/blinkospace/blinko/releases/tag/1.8.4
security-advisories@github.com
https://github.com/blinkospace/blinko/security/advisories/GHSA-r3mv-q7ww-86p6
security-advisories@github.com