CVE-2017-8550 Cross-site scripting in Skype for Business

What is CVE-2017-8550?

CVE-2017-8550 is a medium-severity cross-site scripting vulnerability in Microsoft Office, published on 15 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A remote code execution vulnerability exists in Skype for Business when the software fails to sanitize specially crafted content, aka "Skype for Business Remote Code Execution Vulnerability".

Weakness: CWE-79

Which versions are affected by CVE-2017-8550?

It affects 1 product.

Products include Microsoft Office.

How do I fix CVE-2017-8550?

No fix has been published for CVE-2017-8550 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-2017-8550 being exploited?

There is no known exploitation of CVE-2017-8550 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Microsoft Office

• CVE-2018-0798 Microsoft Office Memory Corruption Exploited High 8.8
• CVE-2015-1770 Microsoft Office Uninitialized Memory Use Exploited High 8.8
• CVE-2006-2492 Microsoft Word Malformed Object Pointer Exploited High 8.8
• CVE-2018-0802 Microsoft Office Memory Corruption Exploited High 7.8
• CVE-2017-11882 Microsoft Office Memory Corruption Exploited High 7.8

All Microsoft Office vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-5r97-fxfw-c4wj.