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CVE-2019-14751
NLTK Downloader before 3.4.5 is vulnerable to a directory traversal, allowing attackers to write arbitrary files via a ../ (dot dot slash)…
- 7.5HighCVSS base score
- 5.7%Exploitation in 30 daysEPSS · top 7.0% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mitre
- 15 days later
· 15 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 5.7% · top 7.0% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
References
8
- https://github.com/nltk/nltk/blob/3.4.5/ChangeLog (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/ (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/mssalvatore/CVE-2019-14751_PoC (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2020-1b90085f8d (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2020-0f785235bb (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- openSUSE-SU-2020:0436 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2020:0440 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-0091 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-mr7p-25v2-35wr (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2019-14751)Record last updated .