{"version":"https://jsonfeed.org/version/1.1","title":"Patchfirst: Sitecore vulnerabilities","home_page_url":"https://patchfirst.co/vendor/sitecore/","feed_url":"https://patchfirst.co/feed/vendor/sitecore.json","description":"New and newly exploited Sitecore CVEs, with CISA KEV, EPSS and ATT&CK context. Newest 50 by publication or KEV listing.","language":"en-GB","items":[{"id":"CVE-2025-53690#kev","url":"https://patchfirst.co/cve/CVE-2025-53690/","title":"[KEV] CVE-2025-53690: Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability","content_text":"Sitecore · Multiple Products. In CISA KEV since 2025-09-04. ENISA EUVD lists it as exploited. EPSS 60.6% (higher than 99.14% of CVEs). CVSS 9.0 CRITICAL. Public exploit code exists. ATT&CK: T1190 Exploit Public-Facing Application; T1059 Command and Scripting Interpreter. Priority 69.1 of 100.","summary":"Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability","date_published":"2025-09-04T00:00:00.000Z","date_modified":"2026-10-18T21:10:00.000Z","tags":["kev","public-exploit","T1190","T1059"],"_patchfirst":{"reason":"kev","priority":69.1,"kev":{"dateAdded":"2025-09-04","ransomware":false},"epss":{"score":0.60601,"percentile":0.99144},"cvss":{"score":9,"severity":"CRITICAL","version":"3.1"},"vendor":"Sitecore","product":"Multiple Products","techniqueIds":["T1190","T1059"],"reportCount":0,"hasPublicExploit":true,"euvdExploited":true}},{"id":"CVE-2025-34511","url":"https://patchfirst.co/cve/CVE-2025-34511/","title":"CVE-2025-34511: Sitecore PowerShell Extension RCE via Unrestricted Upload","content_text":"Sitecore · Powershell Extension. Not in CISA KEV. EPSS 30.4% (higher than 98.2% of CVEs). CVSS 8.8 HIGH. Public exploit code exists. Priority 66.9 of 100.","summary":"Sitecore PowerShell Extension RCE via Unrestricted Upload","date_published":"2025-06-17T00:00:00.000Z","date_modified":"2026-02-26T17:50:30.000Z","tags":["public-exploit"],"_patchfirst":{"reason":"published","priority":66.9,"kev":null,"epss":{"score":0.30446,"percentile":0.98232},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1"},"vendor":"Sitecore","product":"Powershell Extension","techniqueIds":[],"reportCount":0,"hasPublicExploit":true,"euvdExploited":false}},{"id":"CVE-2025-34510","url":"https://patchfirst.co/cve/CVE-2025-34510/","title":"CVE-2025-34510: Sitecore XM, XC, and XP Post-Auth RCE via Zip Slip","content_text":"Sitecore · Experience Manager. Not in CISA KEV. EPSS 24.8% (higher than 97.9% of CVEs). CVSS 8.8 HIGH. Public exploit code exists. Priority 66.8 of 100.","summary":"Sitecore XM, XC, and XP Post-Auth RCE via Zip Slip","date_published":"2025-06-17T00:00:00.000Z","date_modified":"2026-02-26T17:50:31.000Z","tags":["public-exploit"],"_patchfirst":{"reason":"published","priority":66.8,"kev":null,"epss":{"score":0.24835,"percentile":0.97902},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1"},"vendor":"Sitecore","product":"Experience Manager","techniqueIds":[],"reportCount":0,"hasPublicExploit":true,"euvdExploited":false}},{"id":"CVE-2025-34509","url":"https://patchfirst.co/cve/CVE-2025-34509/","title":"CVE-2025-34509: Sitecore XM and XP Hardcoded Credentials","content_text":"Sitecore · Experience Manager. Not in CISA KEV. EPSS 55.9% (higher than 99.04% of CVEs). CVSS 7.5 HIGH. Public exploit code exists. Priority 66.1 of 100.","summary":"Sitecore XM and XP Hardcoded Credentials","date_published":"2025-06-17T00:00:00.000Z","date_modified":"2026-10-29T21:15:17.000Z","tags":["public-exploit"],"_patchfirst":{"reason":"published","priority":66.1,"kev":null,"epss":{"score":0.55874,"percentile":0.99043},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1"},"vendor":"Sitecore","product":"Experience Manager","techniqueIds":[],"reportCount":0,"hasPublicExploit":true,"euvdExploited":false}},{"id":"CVE-2019-9874#kev","url":"https://patchfirst.co/cve/CVE-2019-9874/","title":"[KEV] CVE-2019-9874: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability","content_text":"Sitecore · CMS and Experience Platform (XP). In CISA KEV since 2025-03-26. ENISA EUVD lists it as exploited. EPSS 83.7% (higher than 99.69% of CVEs). CVSS 9.8 CRITICAL. Public exploit code exists. ATT&CK: T1190 Exploit Public-Facing Application; T1059 Command and Scripting Interpreter. Priority 69.8 of 100.","summary":"Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability","date_published":"2025-03-26T00:00:00.000Z","date_modified":"2026-06-17T02:44:46.000Z","tags":["kev","public-exploit","T1190","T1059"],"_patchfirst":{"reason":"kev","priority":69.8,"kev":{"dateAdded":"2025-03-26","ransomware":false},"epss":{"score":0.83736,"percentile":0.99688},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1"},"vendor":"Sitecore","product":"CMS and Experience Platform (XP)","techniqueIds":["T1190","T1059"],"reportCount":0,"hasPublicExploit":true,"euvdExploited":true}},{"id":"CVE-2019-9875#kev","url":"https://patchfirst.co/cve/CVE-2019-9875/","title":"[KEV] CVE-2019-9875: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability","content_text":"Sitecore · CMS and Experience Platform (XP). In CISA KEV since 2025-03-26. ENISA EUVD lists it as exploited. EPSS 25.4% (higher than 97.9% of CVEs). CVSS 8.8 HIGH. Public exploit code exists. ATT&CK: T1190 Exploit Public-Facing Application; T1059 Command and Scripting Interpreter. Priority 68.7 of 100.","summary":"Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability","date_published":"2025-03-26T00:00:00.000Z","date_modified":"2026-06-17T02:44:46.000Z","tags":["kev","public-exploit","T1190","T1059"],"_patchfirst":{"reason":"kev","priority":68.7,"kev":{"dateAdded":"2025-03-26","ransomware":false},"epss":{"score":0.25436,"percentile":0.97946},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1"},"vendor":"Sitecore","product":"CMS and Experience Platform (XP)","techniqueIds":["T1190","T1059"],"reportCount":0,"hasPublicExploit":true,"euvdExploited":true}},{"id":"CVE-2021-42237#kev","url":"https://patchfirst.co/cve/CVE-2021-42237/","title":"[KEV] CVE-2021-42237: Sitecore XP Remote Command Execution Vulnerability","content_text":"Sitecore · XP. In CISA KEV since 2022-03-25, known ransomware use. ENISA EUVD lists it as exploited. EPSS 97.6% (higher than 99.9% of CVEs). CVSS 9.8 CRITICAL. Public exploit code exists. ATT&CK: T1059 Command and Scripting Interpreter. Priority 79.8 of 100.","summary":"Sitecore XP Remote Command Execution Vulnerability","date_published":"2022-03-25T00:00:00.000Z","date_modified":"2026-07-09T13:57:14.000Z","tags":["kev","ransomware","public-exploit","T1059"],"_patchfirst":{"reason":"kev","priority":79.8,"kev":{"dateAdded":"2022-03-25","ransomware":true},"epss":{"score":0.97566,"percentile":0.99902},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1"},"vendor":"Sitecore","product":"XP","techniqueIds":["T1059"],"reportCount":0,"hasPublicExploit":true,"euvdExploited":true}}]}