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CVE-2018-8326

19
FAUCET Score

CVE-2018-8326 describes a cross-site scripting (XSS) vulnerability within open-source customizations for Microsoft Active Directory Federation Services (AD FS), specifically impacting "Web Customizations." This medium-severity vulnerability (CVSS 5.4) can be exploited with low attack complexity by an authenticated attacker, requiring user interaction, to achieve limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog, though it garnered minimal community discussion and media coverage at the time of its disclosure.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.1CPE matchmatch criteria
cpe:2.3:a:microsoft:web_customizations:*:*:*:*:*:active_directory_federation_services:*:*

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
2.37%
Probability of exploitation in next 30 days
EPSS Percentile
82.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0237 is in the 98th percentile among its peer group of 15,224 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 (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Web Customizations for Active Directory Federation Services
View patch

Vendor Advisories (1)

microsoft2018-Jul/CVE-2018-8326Important

Open Source Customization for Active Directory Federation Services XSS Vulnerability

Jul 10, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8326
PatchVendor Advisory
securityfocus.com / bid/104656
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041266
Third Party AdvisoryVDB Entry