CVE-2019-9875VulnerabilityPublished 03/26/2025Updated 10/24/2026
CVE-2019-9875: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
Affects Sitecore CMS and Experience Platform (XP)Source CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 03/26/2025
- KEV deadline
- 04/16/2025
- EPSS
- 13.8% chance of exploitation in 30 days – higher than 96% of CVEs
What to do
CISA 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.
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.