CVE-2019-9874

CRITICAL

9.8

CVSS Score

Published: May 31, 2019 at 08:11 PM UTC

Updated: June 17, 2026 at 02:44 AM UTC

2 products affected across 1 vendorExperience PlatformCMS

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Severity

CRITICAL9.8

Exploitation

CISA KEV

Exploit prediction

EPSS 84%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score83.7%

EPSS (Exploit Prediction Scoring System) estimates a 83.7% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

Required Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Ransomware Use

Unknown

Added to KEV

Mar 26, 2025

Remediation Due

Apr 16, 2025

558 days overdue

Notes

https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035

https://nvd.nist.gov/vuln/detail/CVE-2019-9874

Description

Deserialization of Untrusted Data in the Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2 allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.