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High, CVSS 7.5

Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server

CVE-2021-21403GHSA-8wrg-m8vm-5fvj

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/kongchuanhujiao/server 1.3.21), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
  • CVE-2021-21403: 1.36% estimated exploitation activity in the next 30 days; percentile 71.73 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact Authentication Bypass by Primary Weakness (CWE-305) Commit: https://github.com/kongchuanhujiao/server/commit/9a125624f219e496bdf4b07b404816d5a309bdc1 ALL Users is impacted. Patches Yes, PLEASE UPGRADE TO v1.3.21-beta.d0ffc0a6

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-8wrg-m8vm-5fvj

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2021-21403

Advisory: Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server
IDs: CVE-2021-21403, GHSA-8wrg-m8vm-5fvj
Record: https://patchnext.com/advisories/cve-2021-21403 (revision 1, source checked 26 Oct 2026, 14:54 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/kongchuanhujiao/server 1.3.21. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/kongchuanhujiao/server: affected < 1.3.21; fixed in 1.3.21

## Suggested inspection (read-only)
- Go github.com/kongchuanhujiao/server: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/kongchuanhujiao/server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-8wrg-m8vm-5fvj (GitHub-reviewed advisory GHSA-8wrg-m8vm-5fvj lists affected ranges: Go github.com/kongchuanhujiao/server >=0 <1.3.21)

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