PingFederate OTP Integration Kit: HTTP Method & State Validation Bypass MFA
CVE-2025-27935 Published on December 4, 2025
Authentication Bypass in OTP (One-time Passcode) IdP Adapter Integration Kit
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.
Vulnerability Analysis
CVE-2025-27935 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Affected Versions
Ping Identity One-Time Passcode Integration Kit for PingFederate:- Version 1.0, <= 1.1 is affected.
- Version 1.1.1 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.