CVE-2017-18447
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 · uneditedcPanel before 64.0.21 allows demo accounts to execute code via the ClamScanner_getsocket API (SEC-251).
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 confidencecPanel before version 64.0.21 contains a privilege escalation vulnerability where demo accounts can execute arbitrary code through the ClamScanner_getsocket API (SEC-251). This allows low-privilege demo users to gain code execution capabilities that should not be available to them.
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>= 55.9999.61, < 56.0.49>= 57.9999.48, < 58.0.49>= 59.9999.58, < 60.0.43>= 61.9999.55, < 62.0.24>= 63.9999.74, < 64.0.21CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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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Identify cPanel versionDetermine the installed cPanel version using the system's version command or cPanel interface (typically via /usr/local/cpanel/version or WHM interface)Affected if The installed version falls within any of these ranges: 55.9999.61 through 56.0.48, 57.9999.48 through 58.0.48, 59.9999.58 through 60.0.42, 61.9999.55 through 62.0.23, or 63.9999.74 through 64.0.20
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Verify demo account existenceList all user accounts on the system and identify any accounts designated as demo accounts (typically created for demonstration purposes with limited privileges)Affected if One or more demo accounts exist on the cPanel server
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Confirm ClamScanner API accessibilityCheck whether the ClamScanner_getsocket API function is exposed and callable by user accounts, particularly by reviewing API access controls or attempting to invoke the API call if you have a demo account to testAffected if The ClamScanner_getsocket API is accessible to demo-level users without proper restrictions
The environment is affected if the cPanel version is within the vulnerable ranges AND demo accounts exist with access to the ClamScanner_getsocket API enabling code execution capabilities.
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 data56.0.4958.0.4960.0.43
Upgrade cPanel to version 64.0.21 or later to patch the vulnerability. Additionally, review and restrict demo account permissions to ensure they cannot access APIs that enable code execution.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-18447 — 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-2017-18447 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
- No spam, self-promotion, credentials, or personal data