This security advisory describes one medium risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to the Office Online does not validate origin in cross-origin communications correctly. A remote attacker can send a specially crafted request to an affected site, perform cross-origin attacks on affected systems and gain access to sensitive information.Mitigation
Install updates from vendor's website.Vulnerable software versions
Office Online Server : 2016CPE
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.