Entr'ouvert Lasso is an open-source, Java-based framework for building web applications. The lasso_node_impl_init_from_xml functionality in version 2.5.1 and 2.8.2 allows a type confusion vulnerability that can lead to arbitrary code execution when processing SAML responses. This vulnerability poses a significant risk to organizations using Entr'ouvert Lasso, as it could allow attackers to execute malicious code on their servers.