IssueDescription:

It was found that the default context parameters as provided to RESTEasy deployments by JBoss EAP did not explicitly disable external entity expansion for RESTEasy. A remote attacker could use this flaw to perform XML External Entity (XXE) attacks on RESTEasy applications accepting XML input.

It was discovered that the Role Based Access Control (RBAC) implementation did not sufficiently verify all authorization conditions required by the Maintainer role to perform certain administrative actions. An authenticated user with the Maintainer role can use this flaw to add, modify or undefine a limited set of attributes and their values which otherwise cannot be written to.