providers/saml2/admin.py in the Identity Provider (IdP) server in Ipsilon 0.1.0 before 1.0.1 does not properly check permissions to update the SAML2 Service Provider (SP) owner, which allows remote authenticated users to cause a denial of service via a duplicate SP name.
https://pagure.io/ipsilon/826e6339441546f596320f3d73304ab5f7c10de6
https://fedorahosted.org/ipsilon/wiki/Releases/v1.0.1