Common security concerns related to generating and handling documents within an application include:
1. **Insecure Storage of Sensitive Information**: Encrypt sensitive data like access tokens or credentials and store them securely using protected custom metadata or encrypted fields.
2. **Dynamic SOQL Queries**: Avoid vulnerabilities by sanitizing and securely coding dynamic SOQL queries, especially when sensitive data is involved.
3. **Cross-Site Scripting (XSS)**: Sanitize and encode user input to prevent XSS attacks, and avoid directly injecting user input into the DOM.
4. **Session ID Handling**: Securely obtain and handle session IDs, ensuring they are not exposed inappropriately.
5. **Document Manipulation**: Use framework-supported methods like template directives instead of direct DOM manipulation (e.g., `document.createElement`).
6. **Guest User Access**: Implement secure access controls and use inherited sharing when allowing guest users to update records or access documents.
7. **Third-Party Integrations**: Securely integrate third-party APIs and use static resources for JavaScript instead of embedding it directly.
8. **CRUD/FLS Enforcement**: Enforce proper CRUD (Create, Read, Update, Delete) and FLS (Field-Level Security) checks in Apex code to restrict data access.
9. **False Positive Documentation**: Address false positives from security scans with detailed documentation and resolve genuine vulnerabilities.
These practices help mitigate risks and ensure compliance with security standards. Let me know if you'd like more details on any of these!