CVE-2026-108109
PHPNuxBill through 2025.3.20 Account Takeover via Brute-Forceable Password Reset Code
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-307 |
| Vendor | hotspotbilling |
| Product | phpnuxbill |
| Published | Oct 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
hotspotbilling / phpnuxbill
0 ≤ 2025.3.20
References
github.com: https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-337r-rrrc-r559 github.com: https://github.com/hotspotbilling/phpnuxbill/commit/c3c2a92d468af91136d747b75142ed72f10320cc github.com: https://github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/controllers/forgot.php#L41 github.com: https://github.com/hotspotbilling/phpnuxbill vulncheck.com: https://www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-account-takeover-via-brute-forceable-password-reset-code
Credits
tonghuaroot 🔍 leediay153 from Viettel Post