{"id":"CVE-2021-3915","aliases":["GHSA-w2f4-hxpm-mq98"],"url":"https://o3.security/vulnerability/CVE-2021-3915","summary":"bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type","details":"bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type","published":"2021-11-13T10:15:07.927Z","modified":"2026-08-07T16:57:35.846125Z","cvss":{"score":5.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Packagist","name":"ssddanbrown/bookstack","fixedVersion":"21.0.3"}],"fix":{"url":"https://github.com/bookstackapp/bookstack/commit/ae155d67454d6b9f6c93b2bb457aaa4b2eb1a9ed","label":"bookstackapp/bookstack@ae155d6"},"references":[{"type":"FIX","url":"https://github.com/bookstackapp/bookstack/commit/ae155d67454d6b9f6c93b2bb457aaa4b2eb1a9ed"},{"type":"FIX","url":"https://huntr.dev/bounties/fcb65f2d-257a-46f4-bac9-f6ded5649079"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T16:57:35.846125Z"}}