The newest version of Apple's iOS fixes more than 80 vulnerabilities.

"Most of the plugged vulnerabilities involve the WebKit framework used to render web pages in Safari and other applications," Infosecurity reports. "Apple warned that visiting a malicious website could lead to a 'cross-site scripting attack,' an 'unexpected application termination,' or 'arbitrary code execution,' according to a security advisory."

"Only a few hours after Apple released iOS 5.1, the iPhone Dev Team announced that it had updated the redsn0w jailbreak tool so that it 'supports a tethered 5.1 jailbreak,'" the article states.

Go to "Apple unveils iOS 5.1 with over 80 security fixes" to read the details.

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