Security readout for executives and security teams
Plain-English summary
CVE-2020-13388 is a Python package issue in jw.util before 2.3. If an application loads YAML configuration through affected functions, crafted configuration data can run Python code and lead to operating system command execution.
Executive priority
Treat as priority remediation where affected systems parse untrusted YAML, because the impact can become code execution. If jw.util is absent or inputs are trusted-only, urgency is lower but inventory is still needed.
Technical view
The vulnerability is in jw.util configuration loading before version 2.3. FromString and FromStream can process YAML without safe_load, allowing arbitrary Python code execution when attacker-controlled YAML is parsed.
Likely exposure
Exposure is most likely in Python applications or vendor products that include jw.util before 2.3 and parse YAML configuration from users, files, integrations, or other untrusted sources.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Practical exploitation depends on an attacker influencing YAML loaded by FromString or FromStream in an affected jw.util version.
Researcher notes
The source bundle lacks CVSS, CWE, and detailed affected CPE data. Analysis is therefore centered on the package version, vulnerable functions, YAML parsing behavior, and absence of KEV evidence.
Mitigation direction
- Inventory Python dependencies for jw.util before 2.3.
- Upgrade jw.util to version 2.3 or later where available.
- Avoid parsing untrusted YAML through affected jw.util loaders.
- Use safe YAML loading in owned configuration-loading code.
- Check vendor guidance, including NetApp, for product-specific impact.
Validation and detection
- Check package manifests and deployed environments for jw.util versions.
- Review code for FromString or FromStream YAML loading paths.
- Determine whether YAML inputs are user-controlled or externally supplied.
- Confirm remediation by verifying jw.util is 2.3 or later.
- Document any compensating controls for remaining affected deployments.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2020-13388 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://joel-malwarebenchmark.github.io/CVE reference · x_refsource_MISC
- https://joel-malwarebenchmark.github.io/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability/CVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200528-0002/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.