- 2 Factor Auth - comes as part of the Magento 2.3.x core
- Magento Coding Standard - The Magento Coding Standard also includes security checks
- Magento Vulnerability Database - Central repository for third party Magento extensions with known security issues, including a n98-magerun module
- Magento Extension Best Practices - for Security, Performance and Data Handling
- [Magento XSS Protection]{https://devdocs.magento.com/guides/v2.3/extension-dev-guide/xss-protection.html}
- Serialized to JSON data upgrade
- MageReport - Magento vulnerability scanner (free; external scan)
- Magento Security Scan - Security scanner by Magento
- Magento Malware Scanner - Malware scanner (no longer maintained, paid version at https://sansec.io/?mwscan)
- Magento 2 Security Best Practices
- Magento Security Checklist - A community sourced checklist of security measures to take before launching your store.
- Magento Incident Response Plan Template - A Magento Incident Response Plan Template by Talesh Seeparsan
- Magento 1 Security Patch List - Security Patch List by JH
- Magento introduces the new Security-only Patch Release (2019)