{"id":"CVE-2025-52576","summary":"Kanboard vulnerable to Username Enumeration via Login Behavior and Bruteforce Protection Bypass","details":"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.","aliases":["GHSA-qw57-7cx6-wvp7"],"modified":"2026-08-12T03:51:15.791476160Z","published":"2025-06-25T16:46:01.954Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-203"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52576.json"},"references":[{"type":"WEB","url":"https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Model/UserLockingModel.php#L101-L104"},{"type":"WEB","url":"https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Subscriber/AuthSubscriber.php#L96-L108"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52576.json"},{"type":"ADVISORY","url":"https://github.com/kanboard/kanboard/security/advisories/GHSA-qw57-7cx6-wvp7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52576"},{"type":"FIX","url":"https://github.com/kanboard/kanboard/commit/3079623640dc39f9c7b0c840d2a79095331051f1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kanboard/kanboard","events":[{"introduced":"0"},{"fixed":"839585162a77ac8e9cd9b7c74c7e5ed9da785e72"},{"fixed":"3079623640dc39f9c7b0c840d2a79095331051f1"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.2.46"}]}}],"versions":["v1.2.45","v1.2.44","v1.2.43","v1.2.42","v1.2.41","v1.2.40","v1.2.39","v1.2.38","v1.2.37","v1.2.36","v1.2.35","v1.2.34","v1.2.33","v1.2.32","v1.2.31","v1.2.30","v1.2.29","v1.2.28","v1.2.27","v1.2.26","v1.2.25","v1.2.24","v1.2.23","v1.2.22","v1.2.21","v1.2.20","v1.2.19","v1.2.18","v1.2.17","v1.2.16","v1.2.15","v1.2.14","v1.2.13","v1.2.12","v1.2.11","v1.2.10","v1.2.9","v1.2.8","v1.2.7","v1.2.6","v1.2.5","v1.2.4","v1.2.3","v1.2.2","v1.2.1","v1.2.0","v1.1.1","v1.1.0","v1.0.48","v1.0.46","v1.0.45","v1.0.44","v1.0.43","v1.0.42","v1.0.41","v1.0.40","v1.0.39","v1.0.38","v1.0.37","v1.0.36","v1.0.35","v1.0.34","v1.0.33","v1.0.32","v1.0.31","v1.0.30","v1.0.29","v1.0.28","v1.0.27","v1.0.26","v1.0.20","v1.0.19","v1.0.18","v1.0.17","v1.0.16","v1.0.15","v1.0.14","v1.0.13","v1.0.12","v1.0.11","v1.0.10","v1.0.9","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-52576.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}