The vulnerability was discovered by Clément Lecigne of Google’s Threat Analysis Group and was due to a WebKit type confusion error. Simply put, something in the software code did not match what the software expected. An attacker can then trick her iPhone and iPad users into visiting her malicious webpage created by a malicious person, and put the device under the attacker’s control. WebKit is the browser engine developed by Apple and used by browsers such as Safari.
The 7th generation iPod touch is one of the devices that received the iOS 15.7.2 update.
If you own any of the Apple devices mentioned in the second paragraph, you should visit the following URL and install the update as soon as possible. Configuration > Universal > software updates.