{"identifier":"CVE-2019-9875","cve":{"id":"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.","published":"2019-05-31T21:29:06.187000+00:00","modified":"2026-06-17T02:44:46.273000+00:00","status":"Analyzed","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:sitecore:cms:*:*:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"9.1","versionEndExcluding":""}],"weaknesses":["CWE-502"],"references":[{"url":"https://dev.sitecore.net/Downloads.aspx","source":"cve@mitre.org","tags":["Product","Vendor Advisory"]},{"url":"https://www.synacktiv.com/blog.html","source":"cve@mitre.org","tags":["Third Party Advisory"]},{"url":"https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf","source":"cve@mitre.org","tags":["Exploit","Patch","Third Party Advisory"]},{"url":"https://dev.sitecore.net/Downloads.aspx","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product","Vendor Advisory"]},{"url":"https://www.synacktiv.com/blog.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Patch","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9875","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["US Government Resource"]}],"kev":{"cveID":"CVE-2019-9875","vendorProject":"Sitecore","product":"CMS and Experience Platform (XP)","vulnerabilityName":"Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability","dateAdded":"2025-03-26","shortDescription":"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.","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","dueDate":"2025-04-16","knownRansomwareCampaignUse":"Unknown","forensicTriage":"No","notes":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0038556 ; 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