March 26, 2025 · Applied Cybernetics Group
CVE-2019-9875 — Sitecore CMS and Experience Platform (XP)
Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
- Added to KEV
2025-03-26- Federal due date
2025-04-16- Vendor
- Sitecore
- Product
- CMS and Experience Platform (XP)
- EPSS
- 98.2th percentile (score 0.567, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2019-9875
CISA short 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.