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CVE-2026-33668

HIGH CVSS 4.0: 7.1 EPSS 0.13%
Updated Mar 27, 2026
Vikunja
Parameter Value
CVSS 7.1 (HIGH)
Affected Versions 0.18.0 — 2.2.1
Fixed In 2.2.1
Type CWE-285 (Improper Authorization), CWE-863 (Incorrect Authorization)
Vendor Vikunja
Public PoC No

Vikunja is an open-source self-hosted task management platform. Starting in version 0.18.0 and prior to version 2.2.1, when a user account is disabled or locked, the status check is only enforced on the local login and JWT token refresh paths. Three other authentication paths — API tokens, CalDAV basic auth, and OpenID Connect — do not verify user status, allowing disabled or locked users to continue accessing the API and syncing data.

Version 2.2.1 patches the issue.

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
High
Complete data modification
Availability
None
No disruption

CVSS Vector v4.0

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Vikunja Vikunja
cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*
0.18.0 2.2.1