This checklist should help you to check edge cases that are not part of the default Carrierwave configuration.

• Check Default Configuration and Suggested Changes
• Use secret URLs.
• Check if you need expiring public URLs.
• Check if you need an optimized cache
• Use a nested directory structure
• Make your uploaders remove empty directories
• Deliver sensitive attachments to authorized users only

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

• Prevents you from data breaches and liability risks
• Upgrade at your own pace
• Works with modern Rubies

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When storing images:

• Check if you need to resize your images:
  • ImageMagick.
  • libvips.
• Check if your allow list for file extensions Show archive.org snapshot and content types Show archive.org snapshot is correct.
• Check if you process images efficiently.
• Check if you need to partially remove exif data like GPS:
  • ImageMagick
  • libvips
• Handle color profiles correctly
  • ImageMagick
  • libvips
• Handle rotated images.
• Check if you want to accept GIF images and/or animated GIF images.