{"id":"CVE-2021-4194","aliases":["GHSA-ghhm-xrwp-75m9"],"url":"https://o3.security/vulnerability/CVE-2021-4194","summary":"bookstack is vulnerable to Improper Access Control","details":"bookstack is vulnerable to Improper Access Control","published":"2022-01-06T18:15:07.920Z","modified":"2026-08-07T16:57:39.590051Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"Packagist","name":"ssddanbrown/bookstack","fixedVersion":"21.12.1"}],"fix":{"url":"https://github.com/bookstackapp/bookstack/commit/cb0d674a71449de883713db2fcdccb6e108992ad","label":"bookstackapp/bookstack@cb0d674"},"references":[{"type":"EVIDENCE","url":"https://github.com/bookstackapp/bookstack/commit/cb0d674a71449de883713db2fcdccb6e108992ad"},{"type":"EVIDENCE","url":"https://huntr.dev/bounties/0bc8b3f7-9057-4eb7-a989-24cd5689f114"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T16:57:39.590051Z"}}