Create SECURITY.md

SECURITY.md

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+## Security
+
+Radzen Ltd. takes the security of our software products and services seriously, which includes all source code repositories managed through our GitHub organization.
+
+## Reporting Security Issues
+
+**Please do not report security vulnerabilities through public GitHub issues.**
+
+Instead, send an email to [security@radzen.com](mailto:security@radzen.com).
+
+Please include the requested information listed below (as much as you can provide) to help us better understand the nature and scope of the possible issue:
+
+- Type of issue (e.g. buffer overflow, SQL injection, cross-site scripting, etc.)
+- Full paths of source file(s) related to the manifestation of the issue
+- The location of the affected source code (tag/branch/commit or direct URL)
+- Any special configuration required to reproduce the issue
+- Step-by-step instructions to reproduce the issue
+- Proof-of-concept or exploit code (if possible)
+- Impact of the issue, including how an attacker might exploit the issue
+
+This information will help us triage your report more quickly.
+
+## Preferred Languages
+
+We prefer all communications to be in English.
+
+## Policy
+
+Radzen Ltd. follows the principle of [Coordinated Vulnerability Disclosure](https://insights.sei.cmu.edu/documents/1945/2017_003_001_503340.pdf).
+
+## Supported versions
+The versions of the project that are currently supported with security updates.
+
+| Version | Supported          |
+| ------: | :----------------- | 
+|     4.x | :white_check_mark: |
+|   < 4.0 | :x:                |