Update SECURITY.md

Author: tabacitu

SECURITY.md

@@ -19,6 +19,13 @@ If you discover any security related issues, please email [email protected] inst
 
 ## Past Vulnerabilities
 
-Since its inception in 2016, Backpack has had zero security breaches or reported security issues. However, its dependencies _have_ had security flaws discovered and fixed - even major ones like Laravel, Bootstrap and jQuery. That's why it's a good idea for any project to be reasonably up-to-date. If we consider a security issue is something that affects our users, we'll email you. 
-
-It's _heavily_ recommended that you **[subscribe to the Backpack Newsletter](http://backpackforlaravel.com/newsletter)** so you can find out about any security updates, breaking changes or major features. We send an email about 1-2 emails per year. Sometimes less.
+Please note that even though Backpack has only had minor reported security issues, its dependencies _have_ had security flaws discovered and fixed - even major ones like Laravel, Bootstrap and jQuery. That's why it's a good idea for any project to be reasonably up-to-date. If we consider a security issue is something that affects our users, we'll email you.  Please **[subscribe to the Backpack Newsletter](http://backpackforlaravel.com/newsletter)** so you can find out about any security updates, breaking changes or major features. We only send an email 1-2 emails per year. Sometimes less.
+
+**Past security issues:**
+- 2021 
+    - March - [Security Issue If You Use SQL Server (May Affect <0.02% Backpack Projects)](https://backpackforlaravel.com/articles/news/possible-security-issue-especially-important-if-you-use-sql-server)
+- 2020 - none
+- 2019 - none
+- 2018 - none
+- 2017 - none
+- 2016 - none