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CVE-2018-8428

20
FAUCET Score

CVE-2018-8428 is an elevation of privilege vulnerability in Microsoft SharePoint Server. It arises from improper sanitization of specially crafted web requests, affecting SharePoint installations. With a CVSS score of 5.4 (Medium), exploitation requires user interaction and low privileges, potentially leading to limited confidentiality and integrity impacts. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it was covered in Microsoft's September 2018 Patch Tuesday.

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
1.73%
Probability of exploitation in next 30 days
EPSS Percentile
75.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0173 is in the 97th 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 2016
View patch
microsoftpatch availablevia msrc
Product: Microsoft SharePoint Enterprise Server 2013 Service Pack 1
View patch

Vendor Advisories (1)

microsoft2018-Sep/CVE-2018-8428Important

Microsoft SharePoint Elevation of Privilege Vulnerability

Sep 11, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8428
PatchVendor Advisory
securityfocus.com / bid/105209
Third Party AdvisoryVDB Entry