# CVE-2019-9874: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability

> CVE-2019-9874: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2019-9874
Last updated: 2025-10-21T23:45:35Z

- Published: 2019-05-31 20:11 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 83.7%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-03-26, federal due date 2025-04-16, ransomware use: Unknown

## Description

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.

## 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.

## Affected vendors and products

- Sitecore: CMS and Experience Platform (XP)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2019-9874)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2019-9874)
- [https://dev.sitecore.net/Downloads.aspx](https://dev.sitecore.net/Downloads.aspx)
- [https://www.synacktiv.com/blog.html](https://www.synacktiv.com/blog.html)
- [https://www.synacktiv.com/ressources/advisories/Sitecore\_CSRF\_deserialize\_RCE.pdf](https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2019-9874 · Markdown: https://rewindex.com/cve/CVE-2019-9874.md · JSON: https://rewindex.com/api/v1/cves/CVE-2019-9874 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:46:22.922Z