Sitecore CMS and Experience Platform (XP)
YES - ON THE CISA KEV LIST
CVE-2019-9875
Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
overdue since 2025-04-16
Sitecore: 4 entries (0.2% of all KEV entries are from this vendor); 0 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
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
References
Other KEV entries for this vendor: Sitecore
- CVE-2025-53690 - Multiple Products (2025-09-04)
- CVE-2019-9874 - CMS and Experience Platform (XP) (2025-03-26)
- CVE-2021-42237 - XP (2022-03-25)
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