SimpleSAMLphp 1.7.0 through 1.14.10 might allow attackers to obtain sensitive information, gain unauthorized access, or have unspecified other impacts by leveraging incorrect persistent NameID generation when an Identity Provider (IdP) is misconfigured.
https://www.debian.org/security/2018/dsa-4127
https://simplesamlphp.org/security/201612-04
https://lists.debian.org/debian-lts-announce/2017/12/msg00007.html
https://github.com/simplesamlphp/simplesamlphp/commit/90dca835158495b173808273e7df127303b8b953