Security Researcher Detected: You might have ended up here because your site vulnerability scanner found something interesting. Hi! I'm a security engineer and I'm having a good time interacting with the people and bots that are interested in information security.
You will hopefully find this site is well-secured and I'm not interested in being hacked. I'm interested in learning about how people try to hack me, though.
What is this endpoint?
Autodiscover/Autodiscover.xml
Autodiscover is the feature that Outlook uses to obtain configuration information for servers to which it connects.
What an attacker could do
Exposed Exchange Autodiscover can leak internal hostnames and email configuration and, on unpatched servers, is a known SSRF/RCE vector (ProxyLogon/ProxyShell chains) leading to mailbox access and server compromise.
How to defend it
Keep Exchange fully patched, restrict Autodiscover to authenticated internal clients or a published endpoint, and put a WAF/reverse proxy in front to filter known ProxyShell URL patterns.
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Want to dive deeper into this topic? Check out the official documentation.
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