{"schema":"threatline.record/2","record":{"id":"CVE-2021-42237","aliases":[],"summary":"Sitecore XP Remote Command Execution Vulnerability","details":"Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.","categories":["Unclassified"],"product":"XP","vendor":"Sitecore","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-42237","source_modified_at":"2026-07-09T00:15:11.203Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2022-03-25","due_date":"2022-04-15","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Known"},"epss":{"probability":0.97566,"percentile":0.99904,"score_date":"2026-10-23"},"published_at":"2021-11-05T09:51:18.000Z","modified_at":"2026-07-09T00:15:11.203Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-42237","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-07-09T00:15:11.203Z"},{"source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/sitecore_xp_cve_2021_42237.rb","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2021-11-02"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-42237.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-42237","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Metasploit","Nuclei","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42237","source":"CISA KEV"},{"source":"CVE List","url":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://blog.assetnote.io/2021/11/02/sitecore-rce/","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2025-02-03T14:09:16.771279Z"},"exploits":[{"source":"Metasploit","kind":"Exploit module","name":"Sitecore Experience Platform (XP) PreAuth Deserialization RCE","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/sitecore_xp_cve_2021_42237.rb","date":"2021-11-02","added":"2025-12-17","check":true},{"source":"Nuclei","kind":"Scanner template","name":"Sitecore Experience Platform Pre-Auth RCE","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-42237.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-07-09T00:15:11.203Z","content_hash":"c29a3cad39ae694522c0e47160fb0241e8cb76290befe21f4bf016420bea4ae8"}}