{"id":"CVE-2023-39955","summary":"Notes attachment render HTML in preview mode","details":"Notes is a note-taking app for Nextcloud, an open-source cloud platform. Starting in version 4.4.0 and prior to version 4.8.0, when creating a note file with HTML, the content is rendered in the preview instead of the file being offered to download. Nextcloud Notes app version 4.8.0 contains a patch for the issue. No known workarounds are available.","aliases":["GHSA-6g88-37x7-4vw6"],"modified":"2026-04-02T09:15:44.303920Z","published":"2023-08-10T14:53:42.626Z","database_specific":{"cwe_ids":["CWE-79"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39955.json"},"references":[{"type":"WEB","url":"https://hackerone.com/reports/1924355"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39955.json"},{"type":"ADVISORY","url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6g88-37x7-4vw6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-39955"},{"type":"FIX","url":"https://github.com/nextcloud/notes/pull/1031"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nextcloud/notes","events":[{"introduced":"aa547d01617d5e0fb0a9a783714e3f9b9d73a430"},{"fixed":"50e881eb151ec5b94fa2bfe0b94c5cd3bbc2acc7"}]}],"versions":["v4.4.0","v4.5.0","v4.5.1","v4.6.0","v4.7.0","v4.7.1","v4.7.2","v4.8.0-beta.1","v4.8.0-beta.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-39955.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N"}]}