CVE-2019-9874
Sitecore CMS and Experience Platform (XP)
Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
What it is
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.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor notices and references
- support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035
- nvd.nist.gov/vuln/detail/CVE-2019-9874
Description and required action as published by CISA. Full record at NVD.
Other Sitecore entries on the list
- Multiple Products Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability CVE-2025-53690 · Sep 4, 2025
- CMS and Experience Platform (XP) Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability CVE-2019-9875 · Mar 26, 2025
- XP Sitecore XP Remote Command Execution Vulnerability CVE-2021-42237 · Mar 25, 2022