**Key Security Implementation Requirements for Managed Packages:**
1. **Security Review**: Managed packages must pass a Salesforce Security Review, which includes testing the entire solution and addressing vulnerabilities
2. **Code Scanning**: Use tools like Salesforce Code Analyzer and Source Code Scanner (Checkmarx) to scan packages. Submit updated scan reports and document false positives
3. **Data Protection**: Encrypt sensitive data, such as passwords, using protected custom settings and encrypted fields
4. **Prompt Security**: Avoid including sensitive data or authentication tokens in prompts. Use mitigation strategies to prevent prompt injection vulnerabilities
5. **Documentation and Testing**: Provide detailed user documentation, security scan reports, and access to all solution components. Conduct manual and automated testing
6. **Compliance with Policies**: Follow Salesforce's security policies, secure coding practices, and industry standards
7. **Follow-Up Reviews**: If vulnerabilities are fixed, request a follow-up security review and provide updated materials
**Undocumented Platform Behaviors to Be Aware Of:**
1. **Visualforce Page Loading**: Use `$basePath+"vforcesite"/apex/myvfpage` instead of `basePath/apex/myvfpage` to avoid 404 errors
2. **CRUD/FLS Checks**: Lead with `WITH USER_MODE` for SOQL queries and `AccessLevel.USER_MODE` for Database methods, as these automatically enforce permissions while requiring less code. You can also use `stripInaccessible` for security decisions as it provides comprehensive field-level security enforcement
3. **SOQL Queries**: Use bind variables to prevent injection vulnerabilities. Always validate all field names, expressions, and values in dynamic queries to ensure they're safe
4. **System Mode Operations**: Restrict DML operations to controlled subsets of objects and respect sharing rules to avoid unintended access. System mode can bypass normal security restrictions
5. **Session ID Usage**: Using session IDs for non-sensitive metadata updates is permissible but should be documented and justified in security reviews
6. **Cryptographic Algorithms**: Avoid using MD5 as it's considered weak. Transition to stronger algorithms like SHA-512 for better security
7. **JavaScript Usage**: Use static resources instead of embedding JavaScript directly in the Salesforce DOM or Visualforce pages to avoid security vulnerabilities
8. **Vulnerability Mitigation**: For open redirects or CSRF, implement proper validation mechanisms and use random tokens in custom headers rather than relying on default platform protections
**Additional Platform Considerations:**
- Document any unusual platform behaviors you encounter during development
- Test thoroughly across different Salesforce editions and configurations
- Be aware that some security features may behave differently in system vs user mode
- Consider the impact of Lightning Experience vs Classic when implementing security measures
- Understand that managed package namespaces can affect certain platform behaviors
Documenting and considering these behaviors during development ensures compliance and functionality while avoiding common pitfalls that could lead to security review failures.