Vulnerable component: Microsoft Exchange Server
CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:H/RL:O/RC:C
CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)
The disclosed vulnerability allows a remote user to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input within the Exchange OWA Autodiscover service.. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker to execute arbitrary code on the target system.
Note, the vulnerability is being actively exploited in the wild.