CVE-2017-8559

Name: CVE-2017-8559
Creator: NVD / NIST
Published: 2017-07-11T21:29:00.873+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.42%

Last modified Jun 17, 2026

CVE-2017-8559 is a vulnerability of currently unknown severity. 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-2017-8560.. EPSS estimates a 3.42% chance of exploitation in the next 30 days.

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-2017-8560.

Metrics

EPSS Probability

3.42%

87.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Microsoft	Exchange Server	2013	Cumulative Update 16
Microsoft	Exchange Server	2016	Cumulative Update 5

References

http://www.securityfocus.com/bid/99448Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038852Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8559Patch, Vendor Advisory
http://www.securityfocus.com/bid/99448Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038852Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8559Patch, Vendor Advisory

Timeline

Published: Jul 11, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-8559?

How severe is CVE-2017-8559?

Severity scoring for CVE-2017-8559 is pending analysis. The EPSS model estimates a 3.42% probability of exploitation in the next 30 days.

How do I fix CVE-2017-8559?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-8559?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST