The FAQ content is accurate and well-structured, so no substantial changes are needed. The content effectively covers the main failure categories without being overly technical or verbose. The answer maintains appropriate conversational tone and provides actionable guidance. I selected 14 security rules that directly relate to the specific vulnerabilities mentioned in the FAQ: ApexSOQLInjection relates to 'SOQL injection' mentioned in point 2, ApexCRUDViolation and ApexSharingViolations relate to 'improper access control' in point 2, ApexBadCrypto relates to 'improper encryption' in point 3, ApexInsecureEndpoint relates to 'external integration vulnerabilities' in point 5, ApexOpenRedirect relates to 'insecure loading or management of dynamic resources or URLs' in point 6, ApexXSSFromEscapeFalse and ApexXSSFromURLParam relate to 'problems in Apex and Visualforce code' in point 2, VfCsrf and VfUnescapeEl relate to 'problems in Visualforce code' in point 2, AvoidHardcodedCredentialsInFieldDecls and AvoidHardcodedCredentialsInVarDecls relate to 'insecure storage of sensitive data' in point 3, AvoidInsecureHttpRemoteSiteSetting relates to 'external integration vulnerabilities' in point 5, and AvoidUnauthorizedApiSessionIdInApex relates to 'authentication and authorization' issues in point 4.