CVE-2026-108109
PHPNuxBill through 2025.3.20 contains an account takeover vulnerability in the customer password…
- Risk score
- 76/100
- CVSS
- 9.1 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 9 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 t…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.1 critical
- Remotely exploitable without logging in
- On your watchlist: php
References
- https://github.com/hotspotbilling/phpnuxbill
- https://github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/controllers/forgot.php#L41
- https://github.com/hotspotbilling/phpnuxbill/commit/c3c2a92d468af91136d747b75142ed72f10320cc
- https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-337r-rrrc-r559
- https://www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-account-takeover-via-brute-forceable-password-reset-code
- https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-337r-rrrc-r559
Original 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.
Last activity 9 Oct 2026. Patch Forecast updates every hour.