{"id":"CVE-2019-9874","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-9874","generatedAt":"2026-10-27T21:17:37.110Z","title":"Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability","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.","published":"2019-05-31T21:29:06.000Z","lastModified":"2026-06-17T02:44:46.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":["sitecore/cms","sitecore/experience platform"],"epss":{"score":0.83736,"percentile":0.99685,"date":"2026-10-26","history":[]},"kev":{"listed":true,"dateAdded":"2025-03-26","dueDate":"2025-04-16","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\nhttps://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 16 April 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"https://dev.sitecore.net/Downloads.aspx","tags":["Product","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.synacktiv.com/blog.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf","tags":["Exploit","Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://dev.sitecore.net/Downloads.aspx","tags":["Product","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.synacktiv.com/blog.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf","tags":["Exploit","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9874","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-9874","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}