Adobe has released an emergency update to address a critical security hole in its Flash Player browser plugin that is being actively exploited to deploy malicious software. If you’ve got Flash installed — and if you’re using Google Chrome or a recent version of Microsoft Windows you do — it’s time once again to make sure your copy of Flash is either patched, hobbled or removed.

Last month’s story about organizations exposing passwords and other sensitive data via collaborative online spaces at Trello.com only scratched the surface of the problem. A deeper dive suggests a large number of government agencies, marketing firms, healthcare organizations and IT support companies are publishing credentials via public Trello boards that quickly get indexed by the major search engines.

MyHeritage, an Israeli-based genealogy and DNA testing company, disclosed today that a security researcher found on the Internet a file containing the email addresses and hashed passwords of more than 92 million of its users.

Google is reminding organizations to review how much of their Google Groups mailing lists should be public and indexed by Google.com. The notice was prompted in part by a review that KrebsOnSecurity undertook with several researchers who’ve been busy cataloging thousands of companies that are using public Google Groups lists to manage customer support and in some cases sensitive internal communications.

For as long as scam artists have been around so too have opportunistic thieves who specialize in ripping off other scam artists. This is the story about a group of Pakistani Web site designers who apparently have made an impressive living impersonating some of the most popular and well known “carding” markets, or online stores that sell stolen credit cards.

The Federal Bureau of Investigation (FBI) is warning that a new malware threat has rapidly infected more than a half-million consumer devices. To help arrest the spread of the malware, the FBI and security firms are urging home Internet users to reboot routers and network-attached storage devices made by a range of technology manufacturers.