Cross-site scripting in Office Online Server and Microsoft Office Web Apps Server - CVE-2018-8247
Published: June 12, 2018 / Updated: June 12, 2018
Vulnerability identifier: #VU13302
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-8247
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Office Online Server
Microsoft Office Web Apps Server
Office Online Server
Microsoft Office Web Apps Server
Detailed vulnerability description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within Office Web Apps Server 2013 and Office Online Server. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
How to mitigate CVE-2018-8247
Install updates from vendor's website.