US Cyber Command has issued a rare alert today urging US organizations to patch a massively exploited Atlassian Confluence critical vulnerability immediately.
The USCYBERCOM unit also stressed the importance of patching vulnerable Confluence servers as soon as possible: “Please patch immediately if you haven’t already- this cannot wait until after the weekend.”
On August 25, Atlassian issued security updates to address the actively exploited Confluence remote code execution vulnerability tracked as CVE-2021-26084 and enabling unauthenticated attackers to execute commands on a vulnerable server remotely.
Several cybersecurity companies have reported, both threat actors and security researchers are actively scanning for and exploiting unpatched Confluence servers.
After analyzing exploit samples, BleepingComputer confirmed that the attackers are attempting to install crypto miners on Windows and Linux Confluence servers.
Even though these attackers are currently only deploying cryptocurrency miners, attacks can quickly escalate if the threat actors start moving laterally through corporate networks from hacked on-prem Confluence servers to drop ransomware payload and exfiltrate data.