A vulnerability, which was classified as problematic, has been found in Freeebird Hotel 酒店管理系统 API up to 1.2. Affected by this issue is some unknown functionality of the file /src/main/java/cn/mafangui/hotel/tool/SessionInterceptor.java. The manipulation leads to permissive cross-domain policy with untrusted domains. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.