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MEDIUM severity

CVE-2021-31604 — openvpn-monitor

MEDIUM

CVE-2021-31604 is a medium-severity (CVSS 6.5) Cross-Site Request Forgery (CSRF) vulnerability in openvpn-monitor. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

furlongm openvpn-monitor allows CSRF to disconnect an arbitrary client

Also known asGHSA-vw35-c8hf-fwmqPYSEC-2021-352
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs53th percentile — riskier than 53% of all scored CVEsHighest risk
0.00%0.39%0.79%1.18%0.1%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍openvpn-monitor

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

furlongm openvpn-monitor through 1.1.3 allows CSRF to disconnect an arbitrary client.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐍PyPIopenvpn-monitorall versionsNo fix

Affected Products

1 product · 1 configurations
Application
openvpn-monitoropenvpn-monitor_project
≤ 1.1.3
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

furlongm openvpn-monitor through 1.1.3 allows CSRF to disconnect an arbi…

packetstormsecurity.comNVDOct 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openvpn-monitor, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of openvpn-monitor for CVE-2021-31604. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

furlongm openvpn-monitor through 1.1.3 allows CSRF to disconnect an arbitrary client.
O3 Security · Impact-Aware SCA

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CVE-2021-31604: openvpn-monitor CSRF (Medium 6.5)