ZeroDay Findings
Sign inSign up

Findings

CVE-2019-9875

Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

Published May 31, 2019 · updated Jun 16, 2026 · sitecore cms

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.

Timeline

Detection, updates, and resolution for this record.

  1. May 31, 2019 · Catalog

    Detected

    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.

  2. Mar 26, 2025 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  3. Apr 16, 2025 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

CISA due date Apr 16, 2025

Affected

  • cpe sitecore/cmsversion unspecified
  • vendor Sitecore CMS and Experience Platform (XP)version unspecified

Sources

  • CISA KEVCVE-2019-9875

    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.

    cisa.gov
  • CVE.orgCVE-2019-9875

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2019-9875

    30-day exploitation probability 13.8%

    first.org
  • NIST NVDCVE-2019-9875

    Deserialization of Untrusted Data in the anti CSRF module in Sitecore through 9.1 allows an authenticated attacker to execute arbitrary code by sending a serialized .NET object in an HTTP POST parameter.

    nvd.nist.gov

References