Improper handling of OTP/TOTP/HOTP values in NetKnights GmbH privacyIDEA Authenticator v.4.3.0 on Android allows local attackers with root access to bypass two factor authentication. By hooking into app crypto routines and intercepting decryption paths, attacker can recover plaintext secrets, enabling generation of valid one-time passwords, and bypassing authentication for enrolled accounts.

privacyIDEA version 2.23.1 and earlier contains a Improper Input Validation vulnerability in token validation api that can result in Denial-of-Service. This attack appear to be exploitable via http request with user=<space>&pass= to /validate/check url. This vulnerability appears to have been fixed in 2.23.2.