CVE-2021-21403
Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server
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.
- Record
CVE-2021-21403- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-305
- Updated
- 2026-11-02
EUVDEUVD-2022-0927
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.
- Record
EUVD-2022-0927- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8wrg-m8vm-5fvj
Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server
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
- Record
GHSA-8wrg-m8vm-5fvj- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-287, CWE-305
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-21403- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-305, CWE-287
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-21403- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-8wrg-m8vm-5fvj
Authentication Bypass by Primary Weakness in github.com/kongchuanhujiao/server
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
- Record
GHSA-8wrg-m8vm-5fvj- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-287, CWE-305
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/kongchuanhujiao/serverGo |
before 1.3.21 | 1.3.21 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21403 is a high vulnerability (CVSS 7.5) in Devolutions Server, published March 26, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.36%, the 71st percentile. Fixed in github.com/kongchuanhujiao/server 1.3.21.