8.8High
KEV
CVE-2019-9875Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
Known exploited — Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
CISA confirmed this vulnerability is used in real attacks on 26.03.2025. Remediation deadline for US federal agencies: 16.04.2025.
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. https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0038556 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9875
Description
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.
Weakness (CWE):
CWE-502
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
References and patches
- https://dev.sitecore.net/Downloads.aspx ProductVendor Advisory
- https://www.synacktiv.com/blog.html Third Party Advisory
- https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf ExploitPatchThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9875 US Government Resource
CPE matches (NVD) (1)
cpe:2.3:a:sitecore:cms:*:*:*:*:*:*:*:*≤ 9.1