Can a disabled or locked user still access Vikunja remotely due to this vulnerability?

Yes. If the user has valid API tokens, CalDAV credentials, or can still authenticate via OpenID Connect, they may continue to access the API and sync data despite being marked as disabled or locked.

What level of access does an attacker need to exploit this issue?

Exploitation typically requires possession of existing valid credentials or tokens for an account that has since been disabled or locked. There is no need for network-level exploits; the attacker simply uses alternate authentication paths that do not enforce account status checks.

What is the safest general fix pattern for developers?

Consolidate all authorization decisions into a central component that runs after authentication and before granting any access. This component should consistently verify user status (enabled/disabled/locked) and be invoked for every authentication method, including API tokens, CalDAV, and OIDC.

Severity:

HIGH RISK

(8.1)

Improper Authorization on Disabled Accounts (CWE-285) in Vikunja Authentication Flows

CVE-2026-33668

Published:

Mar 24, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Improper Authorization / Access Control

CWE:

CWE-285;CWE-863

Impact:

Continued access for disabled or locked accounts, bypassing intended account revocation

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Authorization / Access Control

CWE:

CWE-285;CWE-863

Impact:

Continued access for disabled or locked accounts, bypassing intended account revocation

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Improper Authorization on Disabled Accounts (CWE-285) in Vikunja Authentication Flows

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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