CVE-2019-9875

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

Sitecore — CMS and Experience Platform (XP)

Added to KEV catalog: 26 March 2025
Federal remediation due date: 16 April 2025
Weakness classification (CWE): CWE-502

CISA Description

Sitecore CMS and Experience Platform (XP) contain a deserialization vulnerability in the Sitecore.Security.AntiCSRF module that allows an authenticated 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=KB0038556 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9875

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