Update SECURITY.md

SECURITY.md

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 ## Reporting a Vulnerability
 
-Please report a found vulnerability here:
-[https://www.eclipse.org/security/](https://www.eclipse.org/security/)
+Please do **not** report security vulnerabilities through public GitHub issues.
+
+Please report vulnerabilities to this repository via **GitHub security advisories** instead.
+
+__How?__ Inside affected repository --> security tab
+
+for contributor:
+--> Report a vulnerability
+
+for committer:
+--> advisories --> New draft security advisory
+
+In severe cases, you can also report a found vulnerability via mail or eclipse issue here: https://www.eclipse.org/security/
+
+See [Eclipse Foundation Vulnerability Reporting Policy](https://www.eclipse.org/projects/handbook/#vulnerability).