{"cve":"CVE-2021-3874","nvd":{"published":"2021-10-15T14:15:07.757","modified":"2026-06-17T04:05:55.700","status":"Modified","description":"bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-22"],"references":["https://github.com/bookstackapp/bookstack/commit/7224fbcc89f00f2b71644e36bb1b1d96addd1d5a","https://huntr.dev/bounties/ac268a17-72b5-446f-a09a-9945ef58607a","https://github.com/bookstackapp/bookstack/commit/7224fbcc89f00f2b71644e36bb1b1d96addd1d5a","https://huntr.dev/bounties/ac268a17-72b5-446f-a09a-9945ef58607a"],"products":["bookstackapp:bookstack"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-3874","score":0.01202,"percentile":0.68231,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}