CVE-2025-27935: Authentication Bypass in OTP (One-time Passcode) IdP Adapter Integration Kit

Severity: high (CVSS 8.6 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-04 · updated 2026-10-18
Weakness: CWE-306

Description

The OTP Integration Kit for PingFederate fails to enforce HTTP method validation and state validation properly. The server advances the authentication state without verifying the OTP, thereby bypassing multi-factor authentication.

Affected products

Ping Identity One-Time Passcode Integration Kit for PingFederate: from 1.0 through 1.1

References

https://support.pingidentity.com/s/article/SECADV051-PingFederate-OTP-Integration-Kit-authentication-bypass
https://www.pingidentity.com/en/resources/downloads/pingfederate.html

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