{"id":"CVE-2025-58351","aliases":["EUVD-2025-26598","GHSA-gcj7-c9jv-fhgf"],"status":"published","title":"Outline's Local File Storage Feature can Cause CSP Bypass","description":"Outline is a service that allows for collaborative documentation. In versions 0.72.0 through 0.83.0, Outline introduced a feature which facilitates local file system storage capabilities as an optional file storage strategy. This feature allowed a CSP bypass as well as a ContentType bypass that might facilitate further attacks. In the case of self-hosting and using Outline FILE_STORAGE=local on the same domain as the Outline application, a malicious payload can be uploaded as a file attachment and bypass those CSP restrictions, allowing script execution within the context of another user. This is fixed in version 0.84.0.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00403,"percentile":0.3496,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2025-09-03T03:20:54Z","modified":"2026-10-28T02:30:37Z","products":[{"vendor":"getoutline","product":"outline"},{"vendor":"outline","product":"outline"}],"references":[{"url":"https://github.com/outline/outline/security/advisories/GHSA-gcj7-c9jv-fhgf","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://github.com/outline/outline/commit/18bc93c9c207329244c6909606a2393e863892a3","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/outline/outline/releases/tag/v0.84.0","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/58xxx/CVE-2025-58351.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-58351","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-58351","title":"Outline's Local File Storage Feature can Cause CSP Bypass","description":"Outline is a service that allows for collaborative documentation. In versions 0.72.0 through 0.83.0, Outline introduced a feature which facilitates local file system storage capabilities as an optional file storage strategy. This feature allowed a CSP bypass as well as a ContentType bypass that might facilitate further attacks. In the case of self-hosting and using Outline FILE_STORAGE=local on the same domain as the Outline application, a malicious payload can be uploaded as a file attachment and bypass those CSP restrictions, allowing script execution within the context of another user. This is fixed in version 0.84.0.","status":"published","published":"2025-09-03T03:20:54.579Z","modified":"2025-09-03T15:44:28.35Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:37.027582Z"}],"euvd":[{"id":"EUVD-2025-26598","description":"Outline is a service that allows for collaborative documentation. In versions 0.72.0 through 0.83.0, Outline introduced a feature which facilitates local file system storage capabilities as an optional file storage strategy. This feature allowed a CSP bypass as well as a ContentType bypass that might facilitate further attacks. In the case of self-hosting and using Outline FILE_STORAGE=local on the same domain as the Outline application, a malicious payload can be uploaded as a file attachment and bypass those CSP restrictions, allowing script execution within the context of another user. This is fixed in version 0.84.0.","status":"published","published":"2025-09-03T03:20:54Z","modified":"2025-09-03T15:44:28Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T20:31:47.847286Z"}],"nvd":[{"id":"CVE-2025-58351","description":"Outline is a service that allows for collaborative documentation. In versions 0.72.0 through 0.83.0, Outline introduced a feature which facilitates local file system storage capabilities as an optional file storage strategy. This feature allowed a CSP bypass as well as a ContentType bypass that might facilitate further attacks. In the case of self-hosting and using Outline FILE_STORAGE=local on the same domain as the Outline application, a malicious payload can be uploaded as a file attachment and bypass those CSP restrictions, allowing script execution within the context of another user. This is fixed in version 0.84.0.","status":"published","published":"2025-09-03T04:16:05.803Z","modified":"2026-10-19T17:10:00.173Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:11:26.200344Z"}],"osv":[{"id":"CVE-2025-58351","title":"Outline's Local File Storage Feature can Cause CSP Bypass","description":"Outline is a service that allows for collaborative documentation. In versions 0.72.0 through 0.83.0, Outline introduced a feature which facilitates local file system storage capabilities as an optional file storage strategy. This feature allowed a CSP bypass as well as a ContentType bypass that might facilitate further attacks. In the case of self-hosting and using Outline FILE_STORAGE=local on the same domain as the Outline application, a malicious payload can be uploaded as a file attachment and bypass those CSP restrictions, allowing script execution within the context of another user. This is fixed in version 0.84.0.","status":"published","published":"2025-09-03T03:20:54.579Z","modified":"2026-10-28T02:30:37.013967294Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:51.190588Z"}]}}