https://www.bleepingcomputer.com/news/security/exploit-code-released-for-three-ios-0-days-that-apple-failed-to-patch/

Proof-of-concept exploit code for three iOS zero-day vulnerabilities (and a fourth one patched in July) was published on GitHub after Apple delayed patching and failed to credit the researcher.

The unknown researcher who found the four zero-days reported them to Apple between March 10 and May 4. However, the company silently patched one of them in July with the release of 14.7 without giving credit in the security advisory.