CVE-2020-13388 json
OS Command Injection in jw.util
published 2020-05-22 6 y ago modified 2026-06-17 4 mo ago also GHSA-h72c-w3q3-55qq , PYSEC-2020-341 , EUVD-2020-0094
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.5%
- EPSS 4.5% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
An exploitable vulnerability exists in the configuration-loading functionality of the jw.util package before 2.3 for Python. When loading a configuration with FromString or FromStream with YAML, one can execute arbitrary Python code, resulting in OS command execution, because safe_load is not used.
Patch / fix
- pypi jw-util 2.3
- python jw.util 2.3
Exploit prediction
4.53% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- joel-malwarebenchmark.github.io https://joel-malwarebenchmark.github.io referenced PoC, tagged "exploit" by a source, unverified
- joel-malwarebenchmark.github.io https://joel-malwarebenchmark.github.io/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | jw-util | <2.3 |
2.3 |
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
joel-malwarebenchmark.github.io
web, exploit, third-party-advisory
-
joel-malwarebenchmark.github.io
/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability/
exploit, third-party-advisory, article
-
security.netapp.com
/advisory/ntap-20200528-0002/
third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-13388
advisory
-
joel-malwarebenchmark.github.io
/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability
web
-
security.netapp.com
/advisory/ntap-20200528-0002
web
-
github.com
/advisories/GHSA-h72c-w3q3-55qq
advisory
Sources
- CVE List CVE-2020-13388
- GitHub Advisory GHSA-h72c-w3q3-55qq
- NVD CVE-2020-13388
- OSV PYSEC-2020-341
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