{"history":[{"alert":0,"cve":"CVE-2021-42237","id":22297,"kind":"epss","observed_at":1794500401,"payload":"{\"date\": \"2026-11-12\", \"epss\": 0.97399, \"percentile\": 0.99899}"},{"alert":0,"cve":"CVE-2021-42237","id":19916,"kind":"epss","observed_at":1794327601,"payload":"{\"date\": \"2026-11-10\", \"epss\": 0.97566, \"percentile\": 0.99903}"},{"alert":0,"cve":"CVE-2021-42237","id":17882,"kind":"epss","observed_at":1794241201,"payload":"{\"date\": \"2026-11-09\", \"epss\": 0.97566, \"percentile\": 0.99903}"},{"alert":0,"cve":"CVE-2021-42237","id":15946,"kind":"epss","observed_at":1794154800,"payload":"{\"date\": \"2026-11-08\", \"epss\": 0.97566, \"percentile\": 0.99902}"},{"alert":0,"cve":"CVE-2021-42237","id":13924,"kind":"epss","observed_at":1794068402,"payload":"{\"date\": \"2026-11-07\", \"epss\": 0.97566, \"percentile\": 0.99902}"},{"alert":0,"cve":"CVE-2021-42237","id":11706,"kind":"epss","observed_at":1793982001,"payload":"{\"date\": \"2026-11-06\", \"epss\": 0.97566, \"percentile\": 0.99902}"},{"alert":0,"cve":"CVE-2021-42237","id":9692,"kind":"epss","observed_at":1793938800,"payload":"{\"date\": \"2026-11-05\", \"epss\": 0.97566, \"percentile\": 0.99902}"},{"alert":1,"cve":"CVE-2021-42237","id":8376,"kind":"cna","observed_at":1793852400,"payload":"{\"containers\": {\"adp\": [{\"providerMetadata\": {\"dateUpdated\": \"2026-07-09T00:15:11.203Z\", \"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\"}, \"references\": [{\"tags\": [\"x_refsource_MISC\", \"x_transferred\"], \"url\": \"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776\"}, {\"tags\": [\"x_refsource_MISC\", \"x_transferred\"], \"url\": \"https://blog.assetnote.io/2021/11/02/sitecore-rce/\"}, {\"tags\": [\"x_refsource_MISC\", \"x_transferred\"], \"url\": \"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html\"}], \"title\": \"CVE Program Container\"}, {\"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 9.8, \"baseSeverity\": \"CRITICAL\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"version\": \"3.1\"}}, {\"other\": {\"content\": {\"id\": \"CVE-2021-42237\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"role\": \"CISA Coordinator\", \"timestamp\": \"2025-02-03T14:09:16.771279Z\", \"version\": \"2.0.3\"}, \"type\": \"ssvc\"}}, {\"other\": {\"content\": {\"dateAdded\": \"2022-03-25\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237\"}, \"type\": \"kev\"}}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-502\", \"description\": \"CWE-502 Deserialization of Untrusted Data\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2025-10-21T23:25:27.670Z\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\"}, \"references\": [{\"tags\": [\"government-resource\"], \"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2022-03-25T00:00:00.000Z\", \"value\": \"CVE-2021-42237 added to CISA KEV\"}], \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"affected\": [{\"product\": \"n/a\", \"vendor\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.\"}], \"problemTypes\": [{\"descriptions\": [{\"description\": \"n/a\", \"lang\": \"en\", \"type\": \"text\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2026-07-05T00:04:04.014Z\", \"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\"}, \"references\": [{\"url\": \"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776\"}, {\"url\": \"https://blog.assetnote.io/2021/11/02/sitecore-rce/\"}, {\"url\": \"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html\"}], \"x_legacyV4Record\": {\"CVE_data_meta\": {\"ASSIGNER\": \"cve@mitre.org\", \"ID\": \"CVE-2021-42237\", \"STATE\": \"PUBLIC\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"product_name\": \"n/a\", \"version\": {\"version_data\": [{\"version_value\": \"n/a\"}]}}]}, \"vendor_name\": \"n/a\"}]}}, \"data_format\": \"MITRE\", \"data_type\": \"CVE\", \"data_version\": \"4.0\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"n/a\"}]}]}, \"references\": {\"reference_data\": [{\"name\": \"http://sitecore.com\", \"refsource\": \"MISC\", \"url\": \"http://sitecore.com\"}, {\"name\": \"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776\", \"refsource\": \"MISC\", \"url\": \"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776\"}, {\"name\": \"https://blog.assetnote.io/2021/11/02/sitecore-rce/\", \"refsource\": \"MISC\", \"url\": \"https://blog.assetnote.io/2021/11/02/sitecore-rce/\"}, {\"name\": \"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html\", \"refsource\": \"MISC\", \"url\": \"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html\"}]}}}}, \"cveMetadata\": {\"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"assignerShortName\": \"mitre\", \"cveId\": \"CVE-2021-42237\", \"datePublished\": \"2021-11-05T09:51:18.000Z\", \"dateReserved\": \"2021-10-11T00:00:00.000Z\", \"dateUpdated\": \"2026-07-09T00:15:11.203Z\", \"state\": \"PUBLISHED\"}, \"dataType\": \"CVE_RECORD\", \"dataVersion\": \"5.2\"}"},{"alert":0,"cve":"CVE-2021-42237","id":7240,"kind":"epss","observed_at":1793809200,"payload":"{\"date\": \"2026-11-04\", \"epss\": 0.97566, \"percentile\": 0.99902}"},{"alert":0,"cve":"CVE-2021-42237","id":5017,"kind":"epss","observed_at":1793722800,"payload":"{\"date\": \"2026-11-03\", \"epss\": 0.97566, \"percentile\": 0.99902}"},{"alert":0,"cve":"CVE-2021-42237","id":2799,"kind":"epss","observed_at":1793665375,"payload":"{\"date\": \"2026-11-02\", \"epss\": 0.97566, \"percentile\": 0.99902}"},{"alert":1,"cve":"CVE-2021-42237","id":1200,"kind":"kev","observed_at":1793665375,"payload":"{\"cveID\": \"CVE-2021-42237\", \"cwes\": [\"CWE-502\"], \"dateAdded\": \"2022-03-25\", \"dueDate\": \"2022-04-15\", \"forensicTriage\": \"No\", \"knownRansomwareCampaignUse\": \"Known\", \"notes\": \"https://nvd.nist.gov/vuln/detail/CVE-2021-42237\", \"product\": \"XP\", \"requiredAction\": \"Apply updates per vendor instructions.\", \"shortDescription\": \"Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.\", \"vendorProject\": \"Sitecore\", \"vulnerabilityName\": \"Sitecore XP Remote Command Execution Vulnerability\"}"}],"record":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"cna":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2026-07-09T00:15:11.203Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://blog.assetnote.io/2021/11/02/sitecore-rce/"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html"}],"title":"CVE Program Container"},{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},{"other":{"content":{"id":"CVE-2021-42237","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2025-02-03T14:09:16.771279Z","version":"2.0.3"},"type":"ssvc"}},{"other":{"content":{"dateAdded":"2022-03-25","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237"},"type":"kev"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-10-21T23:25:27.670Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237"}],"timeline":[{"lang":"en","time":"2022-03-25T00:00:00.000Z","value":"CVE-2021-42237 added to CISA KEV"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2026-07-05T00:04:04.014Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"url":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776"},{"url":"https://blog.assetnote.io/2021/11/02/sitecore-rce/"},{"url":"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-42237","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"http://sitecore.com","refsource":"MISC","url":"http://sitecore.com"},{"name":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776","refsource":"MISC","url":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776"},{"name":"https://blog.assetnote.io/2021/11/02/sitecore-rce/","refsource":"MISC","url":"https://blog.assetnote.io/2021/11/02/sitecore-rce/"},{"name":"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html","refsource":"MISC","url":"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html"}]}}}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2021-42237","datePublished":"2021-11-05T09:51:18.000Z","dateReserved":"2021-10-11T00:00:00.000Z","dateUpdated":"2026-07-09T00:15:11.203Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"cna_checked":1794349204,"cve":"CVE-2021-42237","description":"Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.","epss":{"date":"2026-11-12","epss":0.97399,"percentile":0.99899},"epss_checked":1794522003,"first_seen":1793665375,"kev":{"cveID":"CVE-2021-42237","cwes":["CWE-502"],"dateAdded":"2022-03-25","dueDate":"2022-04-15","forensicTriage":"No","knownRansomwareCampaignUse":"Known","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-42237","product":"XP","requiredAction":"Apply updates per vendor instructions.","shortDescription":"Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.","vendorProject":"Sitecore","vulnerabilityName":"Sitecore XP Remote Command Execution Vulnerability"},"kev_checked":1794522003,"products":"n/a n/a","references":["https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776","https://blog.assetnote.io/2021/11/02/sitecore-rce/","http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237"],"score":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","provider":"CISA-ADP","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"solutions":"","state":"PUBLISHED","title":"Sitecore XP Remote Command Execution Vulnerability","updated_at":1794500401,"workarounds":""},"sources":[]}