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CVE-2017-11777

19
FAUCET Score

CVE-2017-11777 is a cross-site scripting (XSS) vulnerability in Microsoft SharePoint Enterprise Server 2013 SP1 and 2016, allowing an attacker to execute arbitrary script in a user's browser by sending a specially crafted web request. It has a CVSSv3 score of 5.4 (Medium), indicating a network-based attack with low complexity, requiring user interaction and low privileges, potentially leading to limited impact on confidentiality and integrity. While not listed in CISA's KEV catalog and lacking public exploit code, this vulnerability has garnered significant community discussion and media coverage, suggesting awareness within the security community. Its EPSS score is low, indicating a low probability of exploitation in the wild.

Impacted Technologies

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

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.27%
Probability of exploitation in next 30 days
EPSS Percentile
81.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0227 is in the 98th percentile among its peer group of 15,239 CVEs.

Social Chatter

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

Media Mentions

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

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft SharePoint Enterprise Server 2013 Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Microsoft SharePoint Enterprise Server 2016
View patch

Vendor Advisories (1)

microsoft2017-Oct/CVE-2017-11777Important

Microsoft SharePoint Elevation of Privilege Vulnerability

Oct 10, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-11777
PatchVendor Advisory
securityfocus.com / bid/101155
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039540
Third Party AdvisoryVDB Entry