ProxyShell file write via Exchange — part of three-CVE chain (CVE-2021-34473 + CVE-2021-34523 + CVE-2021-31207) enabling unauthenticated remote code execution on Exchange. Patch Exchange and detect webshells in OWA application directories.
Microsoft Exchange Server Security Feature Bypass Vulnerability allowing attackers to write a file to any path on the server. Part of the ProxyLogon/ProxyShell family.
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