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CVE-2026-108109— PHPNuxBill through 2025.3.20 Account Takeover via Brute-Forceable Password Reset Code

Quick assessment

Affected
hotspotbilling phpnuxbill
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PHPNuxBill 2025.3.20 及更早版本中存在账户接管漏洞。该漏洞位于 文件的客户密码重置流程中，允许未经身份验证的攻击者对 6 位 OTP 代码进行暴力破解。攻击者在已知客户用户名的情况下，可以无尝试次数限制或账户锁定地猜测该代码，并从 HTTP 响应中读取新设置的密码，从而接管账户。

CVSS 9.1 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
hotspotbilling phpnuxbill ≤ 2025.3.20 affected
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I. Basic Information for CVE-2026-108109

Vulnerability Information
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Vulnerability Title
PHPNuxBill through 2025.3.20 Account Takeover via Brute-Forceable Password Reset Code
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
hotspotbilling phpnuxbill 0 ~ 2025.3.20 -

II. Public POCs for CVE-2026-108109

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III. Intelligence Information for CVE-2026-108109

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Patches & Fixes for CVE-2026-108109 (2)

Vendor Advisories for CVE-2026-108109 (2)

Vendor Pages for CVE-2026-108109 (1)

Same Patch Batch · hotspotbilling · 2026-10-09 · 3 CVEs total

CVE-2026-108107 9.8 CRITICAL PHPNuxBill through 2025.3.20 Unauthenticated SQL Injection via radius.php
CVE-2026-108108 7.1 HIGH PHPNuxBill through 2025.3.20 CHAP Authentication Bypass via Password::chap_verify()

IV. Related Vulnerabilities

Same product: phpnuxbill
Same vendor: hotspotbilling
Same weakness: CWE-307

V. Comments for CVE-2026-108109

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