The Threatpost reported on a critical Slack bug.

A critical vulnerability in the popular Slack collaboration app would allow remote code-execution (RCE). Attackers could gain full remote control over the Slack desktop app with a successful exploit — and thus access to private channels, conversations, passwords, tokens and keys, and various functions. They could also potentially burrow further into an internal network, depending on the Slack configuration, according to a security report.

The bug (rated between nine and 10 on the CvSS vulnerability-severity scale), was disclosed on Friday, and involves cross-site scripting (XSS) and HTML injection. Slack for Desktop (Mac/Windows/Linux) prior to version 4.4 are vulnerable.

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