{"schema":"threatline.record/2","record":{"id":"CVE-2021-4171","aliases":["GHSA-xp7p-3gx7-j6wx","PYSEC-2026-307"],"summary":"calibre-web is vulnerable to Business Logic Errors","details":"calibre-web is vulnerable to Business Logic Errors","categories":["Libraries & packages"],"product":"calibreweb","vendor":"janeczku","ecosystem":"pip","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-xp7p-3gx7-j6wx","source_modified_at":"2026-10-27T16:16:33Z","fetched_at":"2026-10-27T16:27:21.584480Z","package":{"ecosystem":"pip","name":"calibreweb"},"range":"< 0.6.15"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-4171","source_modified_at":"2024-08-03T17:16:04.253Z","fetched_at":"2026-10-27T16:27:21.584480Z","product":"janeczku/calibre-web","vendor":"janeczku","versions":[{"lessThan":"0.6.15","status":"affected","version":"unspecified","versionType":"custom"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-xp7p-3gx7-j6wx","source_modified_at":"2026-06-29T12:26:35.954619779Z","fetched_at":"2026-10-27T16:27:21.584480Z","package":{"name":"calibreweb","ecosystem":"PyPI","purl":"pkg:pypi/calibreweb"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.15"}]}],"versions":["0.6.12","0.6.13","0.6.14"]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-xp7p-3gx7-j6wx","source_modified_at":"2026-10-27T16:16:33Z","fetched_at":"2026-10-27T16:27:21.584480Z","package":{"ecosystem":"pip","name":"calibreweb"},"version":"0.6.15"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-4171","source_modified_at":"2024-08-03T17:16:04.253Z","fetched_at":"2026-10-27T16:27:21.584480Z","package":{"name":"janeczku/calibre-web","ecosystem":null},"version":"0.6.15","basis":"first unaffected version stated in the CVE record"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-xp7p-3gx7-j6wx","source_modified_at":"2026-06-29T12:26:35.954619779Z","fetched_at":"2026-10-27T16:27:21.584480Z","package":{"name":"calibreweb","ecosystem":"PyPI","purl":"pkg:pypi/calibreweb"},"version":"0.6.15"}],"cvss":9.8,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.01387,"percentile":0.72103,"score_date":"2026-10-27"},"published_at":"2022-01-17T09:45:10.000Z","modified_at":"2026-10-27T16:16:33Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-xp7p-3gx7-j6wx","fetched_at":"2026-10-27T16:27:21.584480Z","source_modified_at":"2026-10-27T16:16:33Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-4171","fetched_at":"2026-10-27T16:27:21.584480Z","source_modified_at":"2024-08-03T17:16:04.253Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-xp7p-3gx7-j6wx","fetched_at":"2026-10-27T16:27:21.584480Z","source_modified_at":"2026-06-29T12:26:35.954619779Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-4171","fetched_at":"2026-10-27T16:27:21.584480Z","source_modified_at":"2026-10-27"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4171","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/janeczku/calibre-web/commit/3e0d8763c377d2146462811e3e4ccf13f0d312ce","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://huntr.dev/bounties/1117f439-133c-4563-afb2-6cd80607bd5c","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/calibreweb/PYSEC-2026-307.yaml","source":"GitHub Advisory Database"},{"url":"https://pypi.org/project/calibreweb","source":"GitHub Advisory Database"},{"url":"https://github.com/advisories/GHSA-xp7p-3gx7-j6wx","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-27T16:16:33Z","content_hash":"0803cf95efc3a5e097531278a6b6985a4c981bd064cefe7e4cc7139c249d3215"}}