{"id":"CVE-2026-39991","aliases":["EUVD-2026-101986","GHSA-gm69-cjmx-9r3x"],"status":"published","title":"Stored Cross-Site Scripting (XSS) in Note Station file upload functionality","description":"A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.\n\nWe have already fixed the vulnerability in the following version:\nNotes Station 3 3.9.12 and later","severity":{"version":"4.0","score":4.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00293,"percentile":0.22123,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-10-15T09:37:51Z","modified":"2026-10-29T07:41:10Z","products":[{"vendor":"qnap systems inc.","product":"notes station 3"}],"references":[{"url":"https://www.qnap.com/en/app-release-notes?keyword=Notes%20Station%203\u0026app=NotesStation3\u0026product-line=nas","tags":["release-notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39991"},{"url":"https://github.com/advisories/GHSA-gm69-cjmx-9r3x"}],"sources":{"cve":[{"id":"CVE-2026-39991","title":"Stored Cross-Site Scripting (XSS) in Note Station file upload functionality","description":"A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.\n\nWe have already fixed the vulnerability in the following version:\nNotes Station 3 3.9.12 and later","status":"published","published":"2026-10-15T09:37:51.83Z","modified":"2026-10-29T07:41:10.166Z","cvss":[{"version":"4.0","score":4.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:03.081354Z"}],"euvd":[{"id":"EUVD-2026-101986","description":"A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.\n\nWe have already fixed the vulnerability in the following version:\nNotes Station 3 3.9.12 and later","status":"published","published":"2026-10-15T09:37:51Z","modified":"2026-10-29T07:41:10Z","cvss":[{"version":"4.0","score":4.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:17.71975Z"}],"ghsa":[{"id":"GHSA-gm69-cjmx-9r3x","title":"A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a...","description":"A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.\n\nWe have already fixed the vulnerability in the following version:\nNotes Station 3 3.9.12 and later","status":"published","published":"2026-10-15T12:31:01Z","modified":"2026-10-15T12:31:09Z","cvss":[{"version":"4.0","score":4.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:13:35.825754Z"}],"nvd":[{"id":"CVE-2026-39991","description":"A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.\n\nWe have already fixed the vulnerability in the following version:\nNotes Station 3 3.9.12 and later","status":"published","published":"2026-10-15T10:17:14.073Z","modified":"2026-10-15T16:32:39.893Z","cvss":[{"version":"4.0","score":4.8,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:59.328869Z"}]}}