The SecurityTokenService (STS) in Apache CXF before 2.6.12 and 2.7.x before 2.7.9 does not properly validate SAML tokens when caching is enabled, which allows remote attackers to gain access via an invalid SAML token.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.