CVE-2021-31605
furlongm openvpn-monitor command injection
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal%20SIGTERM.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal%20SIGTERM.
- Record
CVE-2021-31605- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-78
- Updated
- 2026-11-02
CVE ListNo score
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal%20SIGTERM.
- Record
CVE-2021-31605- Updated
- 2026-11-02
EUVDEUVD-2021-0162No score
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal%20SIGTERM.
- Record
EUVD-2021-0162- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4258-vcjw-wwxx
furlongm openvpn-monitor command injection
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal SIGTERM.
- Record
GHSA-4258-vcjw-wwxx- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-77
- Updated
- 2026-11-02
OSV
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal%20SIGTERM.
- Record
CVE-2021-31605- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-4258-vcjw-wwxx
furlongm openvpn-monitor command injection
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal SIGTERM.
- Record
GHSA-4258-vcjw-wwxx- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-77
- Updated
- 2026-11-02
OSVPYSEC-2021-353No score
furlongm openvpn-monitor through 1.1.3 allows %0a command injection via the OpenVPN management interface socket. This can shut down the server via signal%20SIGTERM.
- Record
PYSEC-2021-353- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openvpn-monitorPyPI | through 1.1.3 | None known |
openvpn-monitorPyPI | through 1.1.3, plus listed versions 1.0.01.1.2 | None known |
openvpn-monitorPyPI | All versions, plus listed versions 1.0.01.1.21.1.32.0.22.0.32.0.4 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31605 is a high vulnerability (CVSS 7.5) in Openvpn-monitor Project Openvpn-monitor, published September 27, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.40%, the 89th percentile. No source names a fixed version.
References
github.com/furlongm/openvpn-monitor/releases
packetstormsecurity.com/files/164278/OpenVPN-Monitor-1.1.3-Command-Injection.html
nvd.nist.gov/vuln/detail/CVE-2021-31605