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CVE-2026-108108— PHPNuxBill through 2025.3.20 CHAP Authentication Bypass via Password::chap_verify()

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 及之前版本在 RADIUS CHAP 验证中存在身份认证绕过漏洞。具体而言，当提供的响应与预期不匹配时， 函数仍返回 true，从而导致身份验证被绕过。攻击者如果知道有效的客户用户名或 PPPoE 用户名，可以通过 MikroTik 热点或 PPPoE CHAP 使用任意错误的密码登录，从而获取网络访问权限，并滥用该客户账户的资源。

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
hotspotbilling phpnuxbill ≤ 2025.3.20 affected
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I. Basic Information for CVE-2026-108108

Vulnerability Information
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Vulnerability Title
PHPNuxBill through 2025.3.20 CHAP Authentication Bypass via Password::chap_verify()
Source: CVE Program / CVE List V5
Vulnerability Description
PHPNuxBill through 2025.3.20 contains an authentication bypass vulnerability in RADIUS CHAP verification because Password::chap_verify() returns true when the supplied response does not match. Attackers who know a valid customer or PPPoE username can log in through MikroTik hotspot or PPPoE CHAP with any incorrect password to obtain network access and consume that customer's plan.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
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-2026-108108

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III. Intelligence Information for CVE-2026-108108

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Patches & Fixes for CVE-2026-108108 (1)

Vendor Advisories for CVE-2026-108108 (2)

Vendor Pages for CVE-2026-108108 (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-2026-108109 9.1 CRITICAL PHPNuxBill through 2025.3.20 Account Takeover via Brute-Forceable Password Reset Code

IV. Related Vulnerabilities

Same product: phpnuxbill
Same vendor: hotspotbilling
Same weakness: CWE-287

V. Comments for CVE-2026-108108

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