CVE-2018-8326
A cross-site-scripting (XSS) vulnerability exists when an open source customization for Microsoft Active Directory Federation Services (AD FS) does not properly sanitize a specially crafted web request to an affected AD FS server, aka "Open Source…
Does this matter?
Lower severity and a low EPSS score (2.63%). Track it; it rarely justifies an emergency change on its own.
Description
A cross-site-scripting (XSS) vulnerability exists when an open source customization for Microsoft Active Directory Federation Services (AD FS) does not properly sanitize a specially crafted web request to an affected AD FS server, aka "Open Source Customization for Active Directory Federation Services XSS Vulnerability." This affects Web Customizations.
- CVSS 3.0
- 5.4 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 2.63% probability · 85th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- microsoft/web customizations
- Source
- secure@microsoft.com
EPSS moved from 3.7% on 21 September 2026 to 2.6% on 27 October 2026.
References
- http://www.securityfocus.com/bid/104656Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041266Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8326Patch, Vendor Advisory
- http://www.securityfocus.com/bid/104656Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041266Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8326Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.