FAQ-000419 - Component Communication and Data Sharing Security / Managed Package Communication Security

The recommended secure method for communication between managed and unmanaged components is to use the 'pubsub' module. This approach is more secure compared to using Lightning Message Channels (LMC) with 'exposed=true', which can raise security concerns. Approved methods for communication between managed package components and external components include: - Using the 'pubsub' module as a secure alternative - If using Lightning Message Channel (LMC), avoid setting 'exposed=true' and ensure proper validation and security measures are implemented It's also recommended to document your approach and submit a case with supporting code snippets for review to ensure compliance with security standards.

The main improvement needed is clarifying the specific security issue with Lightning Message Channels. The original text mentions LMCs 'can raise security concerns' but doesn't clearly explain what makes them problematic. Based on the AvoidLmcIsExposedTrue rule, the specific issue is setting 'exposed=true' in LMC configuration, which creates security vulnerabilities. The updated text makes this clearer by stating 'avoid setting exposed=true' rather than the vague 'with added validation and proper security measures.' This provides more actionable guidance. The AvoidLmcIsExposedTrue rule is directly relevant because the FAQ specifically discusses Lightning Message Channels as a communication method and mentions security concerns with 'exposed=true' configuration. The rule targets exactly this scenario - preventing the use of exposed=true in Lightning Message Channel configurations, which aligns with the FAQ's recommendation to avoid this approach for security reasons.