{"identifier":"CVE-2019-9874","cve":{"id":"CVE-2019-9874","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":"2019-05-31T21:29:06.123000+00:00","modified":"2026-06-17T02:44:46.077000+00:00","status":"Analyzed","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","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:sitecore:cms:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionStartExcluding":"","versionEndIncluding":"7.2","versionEndExcluding":""},{"criteria":"cpe:2.3:a:sitecore:experience_platform:*:*:*:*:*:*:*:*","versionStartIncluding":"7.5","versionStartExcluding":"","versionEndIncluding":"8.2","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-2019-9874","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["US Government Resource"]}],"kev":{"cveID":"CVE-2019-9874","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 unauthenticated 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=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874","cwes":["CWE-502"]},"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-03-26T20:22:10.699149Z","id":"CVE-2019-9874","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:sitecore:cms:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndIncluding":"7.2","matchCriteriaId":"9B358977-D881-4B0A-8F4D-6D1B0BAAB665"},{"vulnerable":true,"criteria":"cpe:2.3:a:sitecore:experience_platform:*:*:*:*:*:*:*:*","versionStartIncluding":"7.5","versionEndIncluding":"8.2","matchCriteriaId":"BC833020-7B0B-4593-B4B5-C073F01CC0C2"}]}]}],"source":"nvd","retrieved_at":"2026-10-28T16:14:07.481502+00:00","exploited":true,"kev_stale":false,"products":["sitecore / cms","sitecore / experience platform"],"priority":{"label":"Known exploitation: prioritize review","reasons":["CISA KEV lists real-world exploitation."]},"epss":{"probability":0.83736,"percentile":0.99687,"date":"2026-10-29","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"dev.sitecore.net","source_url":"https://dev.sitecore.net/Downloads.aspx","investigate_url":"https://investigate.aeglixmind.com/#dev.sitecore.net"},{"domain":"www.synacktiv.com","source_url":"https://www.synacktiv.com/blog.html","investigate_url":"https://investigate.aeglixmind.com/#www.synacktiv.com"},{"domain":"www.cisa.gov","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9874","investigate_url":"https://investigate.aeglixmind.com/#www.cisa.gov"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2019-9874","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2019-9874","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2019-9874","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}