{"schemaVersion":3,"id":"PYSEC-2019-36","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"NLTK Downloader before 3.4.5 is vulnerable to a directory traversal, allowing attackers to write arbitrary files via a ../ (dot dot slash) in an NLTK package (ZIP archive) that is mishandled during extraction.","dates":{"published":"2019-08-22T16:15:00.000Z","modified":"2023-03-14T07:01:09.343Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"PyPI","product":"nltk","name":"nltk","label":"nltk","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/nltk","purlType":"pypi","versions":[{"text":"< f59d7ed8df2e0e957f7f247fe218032abdbe9a10","noFixRecorded":false,"fixedIn":null},{"text":"< 3.4.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< f59d7ed8df2e0e957f7f247fe218032abdbe9a10 | < 3.4.5","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10","label":"github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10","hostname":"github.com","tags":["WEB"]},{"url":"https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/","label":"salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/","hostname":"salvatoresecurity.com","tags":["WEB"]},{"url":"https://github.com/nltk/nltk/blob/3.4.5/ChangeLog","label":"github.com/nltk/nltk/blob/3.4.5/ChangeLog","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/mssalvatore/CVE-2019-14751_PoC","label":"github.com/mssalvatore/CVE-2019-14751_PoC","hostname":"github.com","tags":["WEB"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["WEB"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["WEB"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html","label":"lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html","hostname":"lists.opensuse.org","tags":["WEB"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html","label":"lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html","hostname":"lists.opensuse.org","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2019-08-22T16:15:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2023-03-14T07:01:09.343Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T07:19:10.461Z","stale":false,"partial":false}}