CVE-2021-41739
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA OS Command Injection vulnerability was discovered in Artica Proxy 4.30.000000. Attackers can execute OS commands in cyrus.events.php with GET param logs and POST param rp.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceArtica Proxy 4.30.000000 contains an OS command injection vulnerability in cyrus.events.php. The vulnerability is triggered via the GET parameter 'logs' and POST parameter 'rp', allowing remote attackers to execute arbitrary operating system commands on the affected server.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 4.30.000000CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Artica Proxy installationLocate Artica Proxy installation directory - common paths include /opt/artica, /usr/local/artica, or check system services for 'artica' process. Identify the main version file, typically named version.php or similar in the installation root.Affected if Artica Proxy version 4.30.000000 is found installed
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Confirm exact version numberRead the version file or execute: php -v (if available) or check the Artica web interface version display at the login page or in the admin panel about section.Affected if Version displays exactly as 4.30.000000
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Locate vulnerable PHP fileSearch for cyrus.events.php in the web root, typically under /var/www/html, /opt/artica/www, or the document root directory. Use: find / -name 'cyrus.events.php' 2>/dev/nullAffected if File cyrus.events.php exists in the installation
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Check web interface exposureVerify the Artica web service is running and accessible. Check if the web port (commonly 9000 or 443) is listening: netstat -tlnp | grep -E '9000|443' or systemctl status artica-webAffected if Web interface is running and network-accessible
You are affected if Artica Proxy version 4.30.000000 is installed with the web interface accessible and the vulnerable cyrus.events.php file is present.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement strict input validation and sanitization for all user-supplied parameters before using them in system calls. Ideally, refactor the code to avoid shell execution entirely or use parameterized methods. Apply vendor patches when available.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-41739 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-41739 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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