When testing an Apple private app still in development, I discovered a critical authorization bypass in their GraphQL API. This vulnerability could have exposed user data before public release. Here's what I found and what developers can learn from it.
This is a GraphQL API authorization vulnerability. The full technical details are available in my detailed write-up:
https://medium.com/@abidakunsamuel74/disclosing-your-unreleased-apple-apps-for-fun-and-profit-09da99ed28a0
Disclaimer
This vulnerability has been responsibly disclosed to Apple, confirmed, and patched. This writeup is shared for educational purposes only to help developers build more secure systems.
Lesson For Developers
- Don't trust client-side permission checks
- Verify user ownership of resources before returning data
- Test your GraphQL resolvers with different user roles
- Authorization bypass is one of the most common and most dangerous security flaws