CVE-2025-52576
Prior to version 1.2.46, Kanboard is vulnerable to username enumeration and IP spoofing-based brute-force protection bypass.
Does this matter?
Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.31% probability · 24th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- kanboard/kanboard
- Source
- security-advisories@github.com
References
- https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Model/UserLockingModel.php#L101-L104Product
- https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Subscriber/AuthSubscriber.php#L96-L108Product
- https://github.com/kanboard/kanboard/commit/3079623640dc39f9c7b0c840d2a79095331051f1Patch
- https://github.com/kanboard/kanboard/security/advisories/GHSA-qw57-7cx6-wvp7Vendor Advisory
- https://github.com/kanboard/kanboard/security/advisories/GHSA-qw57-7cx6-wvp7Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.