{"id":"CVE-2025-52576","state":"PUBLISHED","title":"Kanboard vulnerable to Username Enumeration via Login Behavior and Bruteforce Protection Bypass","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.","publishedAt":"2025-06-25T16:46:01.954Z","updatedAt":"2025-06-25T17:55:05.784Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["kanboard kanboard"],"affected":[{"vendor":"kanboard","product":"kanboard","versions":[{"version":"< 1.2.46","status":"affected"}]}],"references":["https://github.com/kanboard/kanboard/security/advisories/GHSA-qw57-7cx6-wvp7","https://github.com/kanboard/kanboard/commit/3079623640dc39f9c7b0c840d2a79095331051f1","https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Model/UserLockingModel.php#L101-L104","https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Subscriber/AuthSubscriber.php#L96-L108"],"weaknesses":["CWE-203"],"ingestedAt":"2026-10-29T20:09:31.862Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/52xxx/CVE-2025-52576.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-52576","state":"PUBLISHED","datePublished":"2025-06-25T16:46:01.954Z","dateUpdated":"2025-06-25T17:55:05.784Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-06-18T03:55:52.037Z"},"containers":{"cna":{"title":"Kanboard vulnerable to Username Enumeration via Login Behavior and Bruteforce Protection Bypass","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"kanboard","product":"kanboard","versions":[{"version":"< 1.2.46","status":"affected"}]}],"references":[{"url":"https://github.com/kanboard/kanboard/security/advisories/GHSA-qw57-7cx6-wvp7","name":"https://github.com/kanboard/kanboard/security/advisories/GHSA-qw57-7cx6-wvp7","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/kanboard/kanboard/commit/3079623640dc39f9c7b0c840d2a79095331051f1","name":"https://github.com/kanboard/kanboard/commit/3079623640dc39f9c7b0c840d2a79095331051f1","tags":["x_refsource_MISC"]},{"url":"https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Model/UserLockingModel.php#L101-L104","name":"https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Model/UserLockingModel.php#L101-L104","tags":["x_refsource_MISC"]},{"url":"https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Subscriber/AuthSubscriber.php#L96-L108","name":"https://github.com/kanboard/kanboard/blob/cbb7e60fb595ff4572bb8801b275a0b451c4bda0/app/Subscriber/AuthSubscriber.php#L96-L108","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-203","lang":"en","description":"CWE-203: Observable Discrepancy","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-06-25T16:46:01.954Z"},"source":{"advisory":"GHSA-qw57-7cx6-wvp7","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/kanboard/kanboard/security/advisories/GHSA-qw57-7cx6-wvp7","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-06-25T17:55:01.494974Z","id":"CVE-2025-52576","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-06-25T17:55:05.784Z"}}]}}}