{"id":"CVE-2026-88593","title":"kkFileView 5.0.0 through 5.0.2 allows reflected XSS via the /onlinePreview endpoint","summary":"kkFileView 5.0.0 through 5.0.2 allows reflected XSS via the /onlinePreview endpoint. The OnlinePreviewController passes the user-controlled page and kkagent request parameters to FreeMarker templates without sanitization, and the templat…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"published":"2026-09-16","updated":"2026-09-22","sourceUpdated":"2026-09-22T20:00:03.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88593","references":[{"url":"https://github.com/sg-summer/cve/issues/3","label":"cve@mitre.org"},{"url":"https://github.com/sg-summer/cve/issues/3","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00196,"epssPercentile":0.09561,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T15:17:08.345053Z"},"ingestedAt":"2026-09-16T18:01:17.452Z","slug":"CVE-2026-88593","body":"## Overview\n\nkkFileView 5.0.0 through 5.0.2 allows reflected XSS via the /onlinePreview endpoint. The OnlinePreviewController passes the user-controlled page and kkagent request parameters to FreeMarker templates without sanitization, and the templates insert these values into raw JavaScript contexts.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":209164,"id":"CVE-2026-88593","ts":1790093217066,"field":"exploit_available","old":"false","new":"true"},{"seq":209163,"id":"CVE-2026-88593","ts":1790093217066,"field":"cvss","old":null,"new":"6.1"},{"seq":209162,"id":"CVE-2026-88593","ts":1790093217066,"field":"severity","old":"none","new":"medium"}]}