{"version":"https://jsonfeed.org/version/1.1","title":"Patchfirst: ONLYOFFICE vulnerabilities","home_page_url":"https://patchfirst.co/vendor/onlyoffice/","feed_url":"https://patchfirst.co/feed/vendor/onlyoffice.json","description":"New and newly exploited ONLYOFFICE CVEs, with CISA KEV, EPSS and ATT&CK context. Newest 50 by publication or KEV listing.","language":"en-GB","items":[{"id":"CVE-2021-3199#kev","url":"https://patchfirst.co/cve/CVE-2021-3199/","title":"[KEV] CVE-2021-3199: ONLYOFFICE Docs Server Path Traversal Vulnerability","content_text":"ONLYOFFICE · Docs. In CISA KEV since 2026-10-08. ENISA EUVD lists it as exploited. EPSS 30.2% (higher than 98.2% of CVEs). CVSS 9.8 CRITICAL. Public exploit code exists. ATT&CK: T1190 Exploit Public-Facing Application; T1059 Command and Scripting Interpreter. Priority 79.5 of 100.","summary":"ONLYOFFICE Docs Server Path Traversal Vulnerability","date_published":"2026-10-08T00:00:00.000Z","date_modified":"2026-10-09T14:20:47.000Z","tags":["kev","public-exploit","T1190","T1059"],"_patchfirst":{"reason":"kev","priority":79.5,"kev":{"dateAdded":"2026-10-08","ransomware":false},"epss":{"score":0.30244,"percentile":0.98219},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1"},"vendor":"ONLYOFFICE","product":"Docs","techniqueIds":["T1190","T1059"],"reportCount":0,"hasPublicExploit":true,"euvdExploited":true}},{"id":"CVE-2025-5301","url":"https://patchfirst.co/cve/CVE-2025-5301/","title":"CVE-2025-5301: Reflected Cross-Site Scripting in ONLYOFFICE Docs (DocumentServer)","content_text":"OnlyOffice · Docs (DocumentServer). Not in CISA KEV. EPSS 62.4% (higher than 99.18% of CVEs). CVSS 6.1 MEDIUM. Public exploit code exists. Priority 29.1 of 100.","summary":"Reflected Cross-Site Scripting in ONLYOFFICE Docs (DocumentServer)","date_published":"2025-06-12T00:00:00.000Z","date_modified":"2025-06-18T04:08:26.000Z","tags":["public-exploit"],"_patchfirst":{"reason":"published","priority":29.1,"kev":null,"epss":{"score":0.62356,"percentile":0.99183},"cvss":{"score":6.1,"severity":"MEDIUM","version":"3.1"},"vendor":"OnlyOffice","product":"Docs (DocumentServer)","techniqueIds":[],"reportCount":0,"hasPublicExploit":true,"euvdExploited":false}}]}