CVE-2026-108108
CVE-2026-108108
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-6f62-x25v-9686 (vendor-advisory)
- github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/autoload/Password.php (technical-description)
- github.com/hotspotbilling/phpnuxbill (product)
- www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-chap-authentication-b… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108108?
- CVE-2026-108108 is a high-severity vulnerability, classified under Improper Authentication. CVSS score: 7.1/10. Published 2026-10-09.
- How severe is CVE-2026-108108?
- High severity. CVSS v3 base score is 7.1 out of 10.