(CVE-2021-34473) Finding exposed OWA servers vulnerable to proxyshell - A new set of critical vulnerabilities popped-up at this year's BlackHat edition regarding #Microsoft Exchange exploitable via Outlook Web Access. This set of vulnerabilities as been dubbed proxyshell #vuln

https://www.onyphe.io/blog/finding-exposed-owa-servers-vulnerable-to-proxyshell/