{"id":"CVE-2026-108109","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-108109","generatedAt":"2026-10-27T22:48:31.818Z","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.","description":"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 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.","published":"2026-10-09T15:17:12.000Z","lastModified":"2026-10-09T18:17:07.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":9.3,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-307"],"affected":[],"epss":{"score":0.00388,"percentile":0.32603,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.00388,"percentile":0.3082}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-09T15:17:12.000Z","detail":{"score":"9.3","severity":"CRITICAL","publishedAt":"2026-10-09T15:17:12.047Z"},"summary":"New CVE, critical severity (CVSS 9.3)."}],"references":[{"url":"https://github.com/hotspotbilling/phpnuxbill","source":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/controllers/forgot.php#L41","source":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/commit/c3c2a92d468af91136d747b75142ed72f10320cc","source":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-337r-rrrc-r559","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-account-takeover-via-brute-forceable-password-reset-code","source":"disclosure@vulncheck.com"},{"url":"https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-337r-rrrc-r559","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-108109","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}