{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-39991","assignerOrgId":"2fd009eb-170a-4625-932b-17a53af1051f","state":"PUBLISHED","assignerShortName":"qnap","dateReserved":"2026-04-08T02:30:26.921Z","datePublished":"2026-10-15T09:37:51.830Z","dateUpdated":"2026-10-29T07:41:10.166Z"},"containers":{"cna":{"providerMetadata":{"orgId":"2fd009eb-170a-4625-932b-17a53af1051f","shortName":"qnap","dateUpdated":"2026-10-29T07:41:10.166Z"},"title":"Stored Cross-Site Scripting (XSS) in Note Station file upload functionality","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-79","description":"CWE-79","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-592","descriptions":[{"lang":"en","value":"CAPEC-592"}]}],"affected":[{"vendor":"QNAP Systems Inc.","product":"Notes Station 3","versions":[{"status":"affected","version":"3.9.x","lessThan":"3.9.12","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"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","supportingMedia":[{"type":"text/html","base64":false,"value":"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.<br><br>We have already fixed the vulnerability in the following version:<br>Notes Station 3 3.9.12 and later"}]}],"references":[{"url":"https://www.qnap.com/en/app-release-notes?keyword=Notes%20Station%203&app=NotesStation3&product-line=nas","tags":["release-notes"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","subIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":4.8,"vectorString":"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"}}],"solutions":[{"lang":"en","value":"We have already fixed the vulnerability in the following version:\nNotes Station 3 3.9.12 and later","supportingMedia":[{"type":"text/html","base64":false,"value":"We have already fixed the vulnerability in the following version:<br>Notes Station 3 3.9.12 and later"}]}],"credits":[{"lang":"en","value":"HAK-MZ TEAM","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"QNAP PSIRT cve_tool 0.1"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-15T13:32:48.713397Z","id":"CVE-2026-39991","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-15T13:33:02.436Z"}}]}}