{"id":"CVE-2021-3916","aliases":["EUVD-2021-27136","GHSA-g66g-3vwf-hfgf"],"status":"published","title":"Path Traversal in bookstackapp/bookstack","description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","severity":{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01241,"percentile":0.69423,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2021-11-05T14:50:19Z","modified":"2026-10-20T10:54:53Z","products":[{"vendor":"bookstackapp","product":"bookstack"},{"vendor":"bookstackapp","product":"bookstackapp/bookstack"}],"references":[{"url":"https://huntr.dev/bounties/0be32e6b-7c48-43f0-9cec-433000ad8f64","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/bookstackapp/bookstack/commit/43830a372fc51a8793199d04a34c3f4ebdfccc7b","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3916"},{"url":"https://github.com/advisories/GHSA-g66g-3vwf-hfgf"}],"sources":{"cve":[{"id":"CVE-2021-3916","title":"Path Traversal in bookstackapp/bookstack","description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","status":"published","published":"2021-11-05T14:50:19Z","modified":"2024-08-03T17:09:09.688Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:33:03.671751Z"}],"euvd":[{"id":"EUVD-2021-27136","description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","status":"published","published":"2021-11-05T14:50:19Z","modified":"2024-08-03T17:09:09Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T03:25:11.376657Z"}],"ghsa":[{"id":"GHSA-g66g-3vwf-hfgf","title":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path...","description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","status":"published","published":"2022-05-24T19:19:50Z","modified":"2023-01-30T05:03:45Z","cwes":["CWE-22"],"updated_at":"2026-11-02T14:46:54.242582Z"}],"nvd":[{"id":"CVE-2021-3916","description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","status":"published","published":"2021-11-05T15:15:07.89Z","modified":"2026-06-17T04:05:59.057Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:07:00.984108Z"}],"osv":[{"id":"CVE-2021-3916","description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","status":"published","published":"2021-11-05T15:15:07.89Z","modified":"2026-10-20T10:54:53.397424867Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:20.843843Z"}]}}