CVE-2021-23430

HIGHNVD 7.57.5—

7.5

All versions of package startserver are vulnerable to Directory Traversal due to missing sanitization.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 62.9%
KEV: Not listed

Published

August 24, 2021

Last Modified

November 21, 2024

References (4)

report@snykhttps://github.com/xudafeng/startserver/blob/bef0c4e4d21da42a40ce87cf25fd54ac8d8cb2d8/lib/index.js%23L71
report@snykhttps://snyk.io/vuln/SNYK-JS-STARTSERVER-1296388
af854a3a-2127-422b-91ae-364da2661108https://github.com/xudafeng/startserver/blob/bef0c4e4d21da42a40ce87cf25fd54ac8d8cb2d8/lib/index.js%23L71
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JS-STARTSERVER-1296388

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
npm	startserver	—	ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
startserver	—	—	—

Weakness Classification(1)

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

CWE-22Path Traversal

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-07 15:23 UTCepss_batch
2026-06-07 15:23 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-05 22:45 UTCepss_batch
2026-06-05 22:45 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:08 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch

Frequently asked(5)

What is CVE-2021-23430?

CVE-2021-23430 is a high vulnerability published on August 24, 2021. All versions of package startserver are vulnerable to Directory Traversal due to missing sanitization.

When was CVE-2021-23430 disclosed?

CVE-2021-23430 was first published in the National Vulnerability Database on August 24, 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-2021-23430 actively exploited?

CVE-2021-23430 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 62.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-23430?

CVE-2021-23430 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-23430?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-23430, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-23430

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CVE-2021-23430

📅 Published

🔄 Last Modified

🔗 References (4)