All vulnerabilities
CVE-2019-9874

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

Sitecore CMS and Experience Platform (XP)
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 26 Mar 2025CISA KEV
Exploit odds (EPSS)83.7%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline16 Apr 2025Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 31 May 2019, 20:11 UTCPublishedCVE List
  2. 26 Mar 2025Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Scanner templateSitecore Experience Platform - Deserialization of Untrusted DataNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Sitecore CMS and Experience Platform (XP) contain a deserialization vulnerability in the Sitecore.Security.AntiCSRF module that allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.

Text from CVE List

Affected versions 1

  • n/aaffected: n/aCVE List

References 6