SB2026081868 - Improper Restriction of Excessive Authentication Attempts in Wekan

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Restriction of Excessive Authentication Attempts (CVE-ID: N/A)

CWE-ID: CWE-307 - Improper Restriction of Excessive Authentication Attempts

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper restriction of excessive authentication attempts in the wekan-accounts-lockout package, specifically the KnownUser.validateLoginAttempt method, when handling failed login attempts for a known username. A remote attacker can submit repeated incorrect passwords for a target account to cause a denial of service.

The lockout state is tracked in a single global counter per user rather than per source IP, allowing a known username to be locked out from every IP. During the lock window, even correct-password login attempts are rejected, and self-registration for the target is also blocked while the lock is active.

Remediation

Install update from vendor's website.

References

• https://github.com/wekan/wekan/security/advisories/GHSA-rf3w-rj48-jxcc