CVE-2017-8560 Cross-site scripting in Microsoft Exchange Server 2010 SP3, Exchange Server 2013 SP3, Exchange Server 2013 CU16, and Exchange Server 2016 CU5.

Medium 6.1 Published 11 Jul 2017 Updated 16 Sep 2024

An attacker can exploit a cross-site scripting flaw in Exchange OWA to elevate privileges within the Microsoft Exchange Server environment.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2017-8560?

CVE-2017-8560 is a medium-severity cross-site scripting vulnerability in Microsoft Exchange Server, published on 11 Jul 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Microsoft Exchange Server 2010 SP3, Exchange Server 2013 SP3, Exchange Server 2013 CU16, and Exchange Server 2016 CU5 allows an elevation of privilege vulnerability due to the way that Exchange Outlook Web Access (OWA) handles web requests, aka "Microsoft Exchange Cross-Site Scripting Vulnerability". This CVE ID is unique from CVE-2017-8559.

Weakness: CWE-79

Which versions are affected by CVE-2017-8560?

It affects 1 product.

Products include Microsoft Exchange Server.

How do I fix CVE-2017-8560?

No fix has been published for CVE-2017-8560 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2017-8560 being exploited?

There is no known exploitation of CVE-2017-8560 in the wild and no public exploit code.

All Microsoft Exchange Server vulnerabilities

Sources

Also known as GHSA-8hhc-w6w2-395c.