{"id":"CVE-2021-4119","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-4119","generatedAt":"2026-11-05T00:48:27.173Z","title":"bookstack is vulnerable to Improper Access Control","description":"bookstack is vulnerable to Improper Access Control","published":"2021-12-15T20:15:09.000Z","lastModified":"2026-06-17T04:19:04.000Z","status":"Modified","sourceIdentifier":"security@huntr.dev","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-284"],"affected":["bookstackapp/bookstack"],"epss":{"score":0.26893,"percentile":0.9804,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 26.9%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://github.com/bookstackapp/bookstack/commit/e765e618547c92f4e0b46caca6fb91f0174efd99","tags":["Patch","Third Party Advisory"],"source":"security@huntr.dev"},{"url":"https://huntr.dev/bounties/135f2d7d-ab0b-4351-99b9-889efac46fca","tags":["Exploit","Patch","Third Party Advisory"],"source":"security@huntr.dev"},{"url":"https://github.com/bookstackapp/bookstack/commit/e765e618547c92f4e0b46caca6fb91f0174efd99","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://huntr.dev/bounties/135f2d7d-ab0b-4351-99b9-889efac46fca","tags":["Exploit","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-4119","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}