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CVE-2017-8560

21
FAUCET Score

CVE-2017-8560 is an elevation of privilege vulnerability affecting Microsoft Exchange Server 2010 SP3, 2013 SP3/CU16, and 2016 CU5, stemming from improper handling of web requests in Exchange Outlook Web Access (OWA), specifically a cross-site scripting (XSS) flaw. With a CVSS score of 6.1 (Medium), the vulnerability requires user interaction (UI:R) and can be exploited remotely (AV:N) with low attack complexity (AC:L), potentially leading to limited confidentiality and integrity impacts (C:L/I:L). There is no evidence of active exploitation (KEV: No), nor is public exploit code available (Metasploit, Nuclei, ExploitDB: None), though it has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_16:*:*:*:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2013:sp1:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_5:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.42%
Probability of exploitation in next 30 days
EPSS Percentile
87.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0342 is in the 94th percentile among its peer group of 26,220 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2013 Cumulative Update 16
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2016 Cumulative Update 5
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2013 Service Pack 1
View patch

Vendor Advisories (1)

microsoft2017-Jul/CVE-2017-8560Important

Microsoft Exchange Server Elevation of Privilege Vulnerability

Jul 11, 2017

References

portal.msrc.microsoft.com / en-us/security-guidance/advisory/CVE-2017-8560
PatchVendor Advisory
securityfocus.com / bid/99449
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038852
Third Party AdvisoryVDB Entry