{"cvss":9.8,"datePublished":"2025-03-26","dateUpdated":"2025-03-26","description":"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.","dueDate":"2025-04-16","id":"CVE-2019-9874","kev_catalogs":["cisa"],"knownRansomwareCampaignUse":"Unknown","notes":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB0334035 ; https://nvd.nist.gov/vuln/detail/CVE-2019-9874","product":"CMS and Experience Platform (XP)","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.","severity":"CRITICAL","source":"cisa_known_exploited","title":"Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability","vendor":"Sitecore"}