CVE-2021-40903
A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside...
A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.
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
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.
- Record
CVE-2021-40903- 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-798
- Updated
- 2026-11-02
CVE List No score
A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.
- Record
CVE-2021-40903- Updated
- 2026-11-02
EUVDEUVD-2021-28058 No score
A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.
- Record
EUVD-2021-28058- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-grfx-5939-fmgg
A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside...
A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.
- Record
GHSA-grfx-5939-fmgg- 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 - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | vulnz/CVE-2021-40903 | 2022-06-19 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-40903 is a critical vulnerability (CVSS 9.8) in Antminer Monitor Project Monitor, published June 17, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.61%, the 91st percentile. No source names a fixed version.