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The recent critical security issue in VMware vCenter was discovered this January and fixed on February 23rd https://www.vmware.com/security/advisories/VMSA-2021-0002.html. The exploit looks like a simple JSP shell upload, but for some reason, it’s a blind spot for Web Application Firewalls (WAFs). Let’s understand why. The CVE-2021-21972 affects vCenter versions 6.5, 6.7, and 7.0. The exploit for Metasploit released https://vulners.com/packetstorm/PACKETSTORM:161695 today. The exploit description is pretty straight forward “This module exploits an unauthenticated OVA file upload and path traversal in VMware…