IBM Tivoli Federated Identity Manager (TFIM) 6.2.0 before 6.2.0.2 uses an incomplete SAML 1.x browser-artifact, which allows remote OpenID providers to spoof assertions via vectors related to the Issuer field.
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.