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CVE Record
[ CRITICAL ]CVE-2019-9874

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

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.

cat cve-2019-9874.json
Vendor
Sitecore
Product
CMS and Experience Platform (XP)
CVSS
9.8
EPSS (exploit probability)
83.9%
Status
kev
CISA patch-by (BOD 22-01)
Published
Source
https://nvd.nist.gov/vuln/detail/CVE-2019-9874

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.

Added to CISA’s Known Exploited Vulnerabilities catalog on 2025-03-26. Required action per CISA: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Due date: 2025-04-16.

This is an auto-synced KEV catalog record pending a full 0dayNews write-up — see CISA’s KEV catalog and the NVD record linked above for primary sources.