CVE-2020-13388
CVE-2020-13388 is a critical-severity vulnerability in Python Jw.util with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 4% (90th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-78
- Affected product: Python Jw.util
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2020-13388?
- 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.
- How severe is CVE-2020-13388?
- CVE-2020-13388 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-13388 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-13388?
- CVE-2020-13388 affects Python Jw.util. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-13388?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-13388 published?
- CVE-2020-13388 was published on 2020-05-22 and last updated on 2026-06-17.
References
- https://joel-malwarebenchmark.github.io
- https://joel-malwarebenchmark.github.io/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability/
- https://security.netapp.com/advisory/ntap-20200528-0002/
Affected products (1)
- cpe:2.3:a:python:jw.util:*:*:*:*:*:python:*:*
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