{"id":"CVE-2026-108109","title":"PHPNuxBill through 2025.3.20 contains an account takeover vulnerability in the customer password reset flow in system/controllers/forgot.php that allows unauthenticated attackers to brute-force the 6-digit otp_code","summary":"PHPNuxBill through 2025.3.20 contains an account takeover vulnerability in the customer password reset flow in system/controllers/forgot.php that allows unauthenticated attackers to brute-force the 6-digit otp_code. Attackers knowing a c…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-307"],"published":"2026-10-09","updated":"2026-10-09","sourceUpdated":"2026-10-09T18:17:06.727","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-108109","references":[{"url":"https://github.com/hotspotbilling/phpnuxbill","label":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/controllers/forgot.php#L41","label":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/commit/c3c2a92d468af91136d747b75142ed72f10320cc","label":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-337r-rrrc-r559","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-account-takeover-via-brute-forceable-password-reset-code","label":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-337r-rrrc-r559","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"ingestedAt":"2026-10-09T16:02:33.385Z","slug":"CVE-2026-108109","body":"## Overview\n\nPHPNuxBill through 2025.3.20 contains an account takeover vulnerability in the customer password reset flow in system/controllers/forgot.php that allows unauthenticated attackers to brute-force the 6-digit otp_code. Attackers knowing a customer username can guess the code without attempt limits or lockout, then read the newly set password from the HTTP response to hijack the account.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}