An issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitization. This issue is fixed in iOS 15.3 and iPadOS 15.3, watchOS 8.4, tvOS 15.3, macOS Monterey 12.2, macOS Big Sur 11.6.3. An application may be able to access a user's files.
https://support.apple.com/en-us/103177
https://support.apple.com/en-us/103175
https://support.apple.com/en-us/103173
https://support.apple.com/en-us/103172
https://support.apple.com/en-us/102848
https://support.apple.com/en-us/HT213059
https://support.apple.com/en-us/HT213057
https://support.apple.com/en-us/HT213055