CVE-2019-9874
Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
Summary
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.
Affected software
Vendor: Sitecore · Product: CMS and Experience Platform (XP)
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Sitecore
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2021-42237 | Sitecore XP Remote Command Execution Vulnerability | 97.9% | Yes |
| CVE-2025-53690 | Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability | 30.8% | Yes |
| CVE-2019-9875 | Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability | 14.2% | Yes |
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