CVE-2021-21403

HIGHNVD 7.57.5—

7.5

In github.com/kongchuanhujiao/server before version 1.3.21 there is an authentication Bypass by Primary Weakness vulnerability. All users are impacted. This is fixed in version 1.3.21.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 57.8%
KEV: Not listed

Published

March 26, 2021

Last Modified

November 21, 2024

References (4)

security-advisories@githubhttps://github.com/kongchuanhujiao/server/commit/9a125624f219e496bdf4b07b404816d5a309bdc1
security-advisories@githubhttps://github.com/kongchuanhujiao/server/security/advisories/GHSA-8wrg-m8vm-5fvj
af854a3a-2127-422b-91ae-364da2661108https://github.com/kongchuanhujiao/server/commit/9a125624f219e496bdf4b07b404816d5a309bdc1
af854a3a-2127-422b-91ae-364da2661108https://github.com/kongchuanhujiao/server/security/advisories/GHSA-8wrg-m8vm-5fvj

Affected Packages

(1 across 1 ecosystem)

Go(1)

Package	Vulnerable range	Fixed in	Dependents
github.com/kongchuanhujiao/server	—	1.3.21	—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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.

2026-05-27 13:39 UTCepss_batch
2026-05-26 19:07 UTCEG score recompute
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-21403?

CVE-2021-21403 is a high vulnerability published on March 26, 2021. In github.com/kongchuanhujiao/server before version 1.3.21 there is an authentication Bypass by Primary Weakness vulnerability. All users are impacted. This is fixed in version 1.3.21.

When was CVE-2021-21403 disclosed?

CVE-2021-21403 was first published in the National Vulnerability Database on March 26, 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-2021-21403 actively exploited?

CVE-2021-21403 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-21403?

CVE-2021-21403 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-21403?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21403, 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-2021-21403

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