Apple has released a new version of iPadOS, version 15.3, which is mostly security updates. Some of these are downright scary when you read the (fairly scarce) release notes, such as:
iCloud
Impact: An application may be able to access a user’s files
Description: An issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitization.
Or any of the issues related to WebKit, for that matter. Now, WebKit is the browser engine behind Safari, and, for iPadOS and iOS, every other web browser you see on the platform. So, yeah, better get updating then.
ℹ️ There are also updates to iOS, watchOS, tvOS, macOS, and HomePod.