{"id":"CVE-2023-39955","aliases":["EUVD-2023-43653","GHSA-6g88-37x7-4vw6"],"status":"published","title":"Notes attachment render HTML in preview mode","description":"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.","severity":{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00588,"percentile":0.48555,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2023-08-10T14:53:42Z","modified":"2026-10-28T02:30:52Z","products":[{"vendor":"kiteworks","product":"security-advisories"},{"vendor":"nextcloud","product":"notes"},{"vendor":"nextcloud","product":"security-advisories"}],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6g88-37x7-4vw6","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory"]},{"url":"https://github.com/nextcloud/notes/pull/1031","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"https://hackerone.com/reports/1924355","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/39xxx/CVE-2023-39955.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-39955","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-39955","title":"Notes attachment render HTML in preview mode","description":"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.","status":"published","published":"2023-08-10T14:53:42.626Z","modified":"2024-10-04T18:23:55.573Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:35:33.462059Z"}],"euvd":[{"id":"EUVD-2023-43653","description":"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.","status":"published","published":"2023-08-10T14:53:42Z","modified":"2024-10-04T18:23:55Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-03T00:27:50.41571Z"}],"nvd":[{"id":"CVE-2023-39955","description":"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.","status":"published","published":"2023-08-10T15:15:09.807Z","modified":"2026-06-17T06:13:01.517Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:08:22.812138Z"}],"osv":[{"id":"CVE-2023-39955","title":"Notes attachment render HTML in preview mode","description":"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.","status":"published","published":"2023-08-10T14:53:42.626Z","modified":"2026-10-28T02:30:52.294930618Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:33.244128Z"}]}}