CVE-2026-108108highCWE-287

CVE-2026-108108: high-severity vulnerability in hotspotbilling phpnuxbill

PHPNuxBill through 2025.3.20 CHAP Authentication Bypass via Password::chap_verify()

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.1epss 0.2%
exploitation probability
0.2%top 87% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
hotspotbilling · phpnuxbill
Related CVEs — hotspotbilling phpnuxbill

In the same product, most dangerous first.

CVE-2026-108107CRITICALPHPNuxBill through 2025.3.20 Unauthenticated SQL Injection via radius.phpEPSS 0.4%CVE-2026-108109CRITICALPHPNuxBill through 2025.3.20 Account Takeover via Brute-Forceable Password Reset CodeEPSS 0.4%
References
https://github.com/hotspotbilling/phpnuxbillhttps://github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/autoload/Password.php#L48https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-6f62-x25v-9686https://www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-chap-authentication-bypass-via-password-chap-verify