HIGH
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
Published Aug 22, 2019
8.7
HIGHCVSS 4.0
EPSS 5.67%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
8.7 HIGH GHSA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality None
Vulnerable System Integrity High
Vulnerable System Availability None
Subsequent System Confidentiality None
Subsequent System Integrity None
Subsequent System Availability None
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
5.67% 0.05674
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.05674
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (27 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.67% (0.05674) | 92.75th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.83% (0.05831) | 92.17th | v5 (v2026.06.15) |
| Nov 21, 2025 | 3.22% (0.03222) | 86.56th | v4 (v2025.03.14) |
| Nov 18, 2025 | 10.35% (0.10350) | 92.43th | v4 (v2025.03.14) |
| Jul 16, 2025 | 3.22% (0.03222) | 86.54th | v4 (v2025.03.14) |
| May 18, 2025 | 8.75% (0.08752) | 92.02th | v4 (v2025.03.14) |
| Mar 30, 2025 | 16.83% (0.16831) | 94.39th | v4 (v2025.03.14) |
| Mar 29, 2025 | 33.47% (0.33467) | 95.21th | v4 (v2025.03.14) |
| Mar 28, 2025 | 16.83% (0.16831) | 94.40th | v4 (v2025.03.14) |
| Mar 27, 2025 | 33.47% (0.33467) | 96.32th | v4 (v2025.03.14) |
| Mar 20, 2025 | 16.83% (0.16831) | 94.44th | v4 (v2025.03.14) |
| Mar 19, 2025 | 33.47% (0.33467) | 96.39th | v4 (v2025.03.14) |
| Mar 17, 2025 | 16.83% (0.16831) | 94.44th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.77% (0.00774) | 81.99th | v3 (v2023.03.01) |
| Apr 10, 2024 | 0.61% (0.00614) | 78.40th | v3 (v2023.03.01) |
| Dec 16, 2023 | 0.61% (0.00614) | 76.38th | v3 (v2023.03.01) |
| Jul 29, 2023 | 0.62% (0.00623) | 76.13th | v3 (v2023.03.01) |
| Jul 13, 2023 | 0.55% (0.00545) | 74.33th | v3 (v2023.03.01) |
| May 9, 2023 | 0.40% (0.00400) | 69.71th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.35% (0.00346) | 67.12th | v3 (v2023.03.01) |
| Mar 6, 2023 | 19.17% (0.19173) | 96.36th | v2 (v2022.01.01) |
| Apr 1, 2022 | 19.17% (0.19173) | 96.03th | v2 (v2022.01.01) |
| Feb 4, 2022 | 19.17% (0.19173) | 93.71th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.85% (0.07855) | 85.01th | v1 |
| Jan 6, 2022 | 7.85% (0.07855) | 84.84th | v1 |
| Sep 1, 2021 | 7.85% (0.07855) | 92.31th | v1 |
| Apr 14, 2021 | 7.85% (0.07855) | 0.00th | v1 |
Weaknesses (1)
References (13)
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html vendor-advisoryx_refsource_SUSE
- https://github.com/advisories/GHSA-mr7p-25v2-35wr Advisory
- https://github.com/mssalvatore/CVE-2019-14751_PoC x_refsource_MISCExploitPatchThird Party Advisory
- https://github.com/nltk/nltk/blob/3.4.5/ChangeLog x_refsource_CONFIRMRelease Notes
- https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10 x_refsource_CONFIRMPatch
- https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2019-106.yaml
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE
- https://nvd.nist.gov/vuln/detail/CVE-2019-14751
- https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751 x_refsource_MISCExploitPatchThird Party Advisory
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 22, 2019
Updated Aug 5, 2024
Reserved Aug 7, 2019
Link CVE-2019-14751
CISA Vulnrichment
GHSA-MR7P-25V2-35WR Updated n/a