CVE Watch—

CVE-2019-9874

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

CVSS

—

No CVSS

EPSS

83.7%

p100

KEV

YES

Mar 26, 2025

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

83.7%EPSS · 30 days83.7%

2026-09-172026-10-14

KEV catalog record

Product

Sitecore / CMS and Experience Platform (XP)

Vulnerability

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

Added to KEV

Mar 26, 2025

Remediate by

Apr 16, 2025

Known ransomware use

Summary 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.

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.

Notes

https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874

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CVE-2019-9875—

96.5%

KEV—79Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability—