CVE-2017-12870: Simplesamlphp

Medium severity, CVSS 5.9. EPSS: 0.9% chance of exploitation in the next 30 days.

SimpleSAMLphp 1.14.12 and earlier make it easier for man-in-the-middle attackers to obtain sensitive information by leveraging use of the aesEncrypt and aesDecrypt methods in the SimpleSAML/Utils/Crypto class to protect session identifiers in replies to non-HTTPS service providers.

Affected products

• Simplesamlphp Simplesamlphp: up to and including 1.14.12

Published 2017-09-01. Last modified 2026-06-17.