CVE-2019-9874

Deserialization of Untrusted Data in the Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2 allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - cve@mitre.org

Published

2019-05-31

Last modified

2025-10-21

Known exploited (CISA KEV)

since 2025-03-26, action due 2025-04-16: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weaknesses

CWE-502

Affected products

• Cms (Sitecore)
• Experience Platform (Sitecore)

References

• https://dev.sitecore.net/Downloads.aspx
• https://www.synacktiv.com/blog.html
• https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9874