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SECURITY.md

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+# Security Policy
+
+ ## Supported Versions
+
+ To receive fixes for security vulnerabilities it is required to always upgrade to the latest version of Poseidon. 
+ See https://github.com/openHPI/poseidon/tree/main for the latest version.
+
+ ## Reporting a Vulnerability
+
+ If you have found a vulnerability or you are uncertain whether what you have discovered is a vulnerability,
+ please send an email to sebastian.serth@hpi.de ([GPG Key](https://github.com/mrserth.gpg)).
+
+ If you have a patch for the issue please use `git format-patch` and attach it to the email. Please do not open an issue or 
+ pull request on GitHub as that may disclose sensitive details around the vulnerability.
+