The vulnerability was discovered by Clément Lecigne of Google’s Threat Analysis Group and was caused by a WebKit type-confusion error. In simple terms, something in the software code was not matching up with what the software was expecting. The attackers could then trick iPhone and iPad users into visiting a malicious webpage that was created by the bad actors allowing the device to fall under the control of the attackers. WebKit is the browser engine developed by Apple and is used on Safari and other browsers.
The seventh-generation iPod touch is one of the devices that received the iOS 15.7.2 update
If you own one of the Apple devices mentioned in the second paragraph, you should install the update as soon as possible by going to Settings > General > Software Update.