What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-14
• Weakness: CWE-287

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.

Affected products

• hotspotbilling phpnuxbill: through 2025.3.20

References

• https://github.com/hotspotbilling/phpnuxbill
• https://github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/autoload/Password.php#L48
• https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-6f62-x25v-9686
• https://www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-chap-authentication-bypass-via-password-chap-verify
• https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-6f62-x25v-9686

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