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Exploits
ID:12258 - Exploit for Improper Authentication in Kanboard - CVE-2026-21881
ID:12258 - Exploit for Improper Authentication in Kanboard - CVE-2026-21881
Published: January 7, 2026
Vulnerability identifier: #VU121017
Vulnerability risk: High
CVE-ID: CVE-2026-21881
CWE-ID: CWE-287
Exploitation vector: Remote access
Vulnerable software:
Kanboard
Kanboard
Link to public exploit:
Vulnerability description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when REVERSE_PROXY_AUTH is enabled. A remote attacker can bypass authentication process and gain unauthorized access to the application.
Remediation
Install updates from vendor's website.