While you were busy kicking off your weekend, Apple announced a fix to a security flaw in its operating system Friday night. Many users may have missed the importance of the low-key announcement, but this update fixes a serious vulnerability to "man in the middle attacks" and should de downloaded as soon as possible.

Basically, the flaw leaves users on insecure WiFi connections open to third-party attacks. As Wired put it, "The bug essentially means that when you’re e-mailing, tweeting, using Facebook or checking your bank account from a shared network, like a public WiFi or anything tapped by the NSA, an attacker could be listening in, or even maliciously modifying what goes to your iPhone or iPad."

In other words, update your devices now.

If that's not enough to convince you to take the few minutes required to download the "fix for SSL connection verification," take it from cryptography expert Matthew Green.