CVE-2025-52576

Description

Kanboard is project management software that focuses on the Kanban methodology. Prior to version 1.2.46, Kanboard is vulnerable to username enumeration and IP spoofing-based brute-force protection bypass. By analyzing login behavior and abusing trusted HTTP headers, an attacker can determine valid usernames and circumvent rate-limiting or blocking mechanisms. Any organization running a publicly accessible Kanboard instance is affected, especially if relying on IP-based protections like Fail2Ban or CAPTCHA for login rate-limiting. Attackers with access to the login page can exploit this flaw to enumerate valid usernames and bypass IP-based blocking mechanisms, putting all user accounts at higher risk of brute-force or credential stuffing attacks. Version 1.2.46 contains a patch for the issue.

Reserved 2025-06-18 | Published 2025-06-25 | Updated 2025-06-25 | Assigner GitHub_M

Problem types

CWE-203: Observable Discrepancy

Product status

< 1.2.46
affected

References

github.com/...nboard/security/advisories/GHSA-qw57-7cx6-wvp7

github.com/...ommit/3079623640dc39f9c7b0c840d2a79095331051f1

github.com/...275a0b451c4bda0/app/Model/UserLockingModel.php

github.com/...a0b451c4bda0/app/Subscriber/AuthSubscriber.php

cve.org (CVE-2025-52576)

nvd.nist.gov (CVE-2025-52576)

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