add ShuipFCMS authcode leak and RCE

shuipFCMS/ShuipFCMS_authcode_leak_and_RCE/README.md

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+# ShuipFCMS authcode leak and RCE
+
+Shuipfcms is a content management system based on ThinkPHP framework and developed by independent grouping. The vulnerability exists in shuipfcms, which can be exploited by an attacker to gain control of the server
+
+**FOFA query rule**: [header="X-Powered-By: ShuipFCMS"](https://fofa.so/result?qbase64=aGVhZGVyPSJYLVBvd2VyZWQtQnk6IFNodWlwRkNNUyI%3D)
+
+# Demo
+
+![](ShuipFCMS_authcode_leak_and_RCE.gif)