CVE-2019-9875 — Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
CVE-2019-9875: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Sitecore |
| Product | CMS and Experience Platform (XP) |
| Date added | 2025-03-26 |
| Due date | 2025-04-16 |
| Ransomware campaign use | Unknown |
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0038556 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9875
Weakness behind it
CISA records this vulnerability as an instance of CWE-502. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-9875
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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