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CVE-2026-23480

Blinko: Low Privilege User Privilege Escalation - upsertUser Endpoint

Published: Mar 23, 2026Updated: Mar 24, 2026 Sources: CVE List NVDCWE-288
NVD MITRE
8.8CVSSHIGH
EPSS Score
0.3%
Top 74.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-288

Affected Products

blinkoblinko
blinkoblinkospace

Exploitability

Official Patch Available

References

https://github.com/blinkospace/blinko/commit/3afbdf486b6f371bdac5781dea6289749f2c4c03
github.com
https://github.com/blinkospace/blinko/releases/tag/1.8.4
github.com
https://github.com/blinkospace/blinko/security/advisories/GHSA-r3mv-q7ww-86p6
github.com

Timeline

Published
Mar 23, 2026
Last Updated
Mar 24, 2026

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