CVE-2021-23338

MEDIUMNVD 6.66.6—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.6 under NVD CVSS v3. EPSS exploit probability: 3.6%, top 12% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 4%CVSS: 6.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

This affects all versions of package qlib. The workflow function in cli part of qlib was using an unsafe YAML load function.

CVSS v3
6.6
EG Score
6.6(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity66% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
88.1%
KEV
Not listed

Published

February 15, 2021

Last Modified

November 21, 2024

References (4)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
pyqlib0.5.0.dev10 ... 0.6.2 (9 versions)0.6.3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:57 UTCEG score recompute
  3. 2026-07-22 22:44 UTCEG score recompute
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  1. 2026-07-06 02:21 UTCEPSS rescore
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  63. 2026-05-27 13:39 UTCEPSS rescore
  64. 2026-05-26 20:48 UTCEG score recompute
  65. 2026-05-26 13:42 UTCEPSS rescore
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  67. 2026-05-26 07:17 UTCEPSS rescore
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  69. 2026-05-24 16:49 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-23338?
CVE-2021-23338 is a medium vulnerability published on February 15, 2021. This affects all versions of package qlib. The workflow function in cli part of qlib was using an unsafe YAML load function.
When was CVE-2021-23338 disclosed?
CVE-2021-23338 was first published in the National Vulnerability Database on February 15, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-23338 actively exploited?
CVE-2021-23338 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-23338?
CVE-2021-23338 has a CVSS v3 base score of 6.6 (NVD).
How do I remediate CVE-2021-23338?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-23338, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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