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CVE-2019-9874: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
Sitecore CMS and Experience Platform (XP) · in CISA KEV since 2025-03-26
2025-03-26added to KEV
2025-04-16federal remediation due date
83.74%EPSS exploit probability (30 days) 99.7th percentile
9.8 CRITICALCVSS 3.1
Unknownknown ransomware use
2,126days from NVD publication to KEV
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-502 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2019-05-31 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2019-9874.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.