Incorrect Permission Assignment for Critical Resource
LightSAML version prior to 1.3.5 contains a Incorrect Access Control vulnerability in signature validation in readers in src/LightSaml/Model/XmlDSig/ that can result in impersonation of any user from Identity Provider. This vulnerability appears to have been fixed in 1.3.5 and later.
CWE-732 - Incorrect Permission Assignment for Critical Resource
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.