CVE-2017-18415
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 67.9999.103 allows code execution in the context of the mailman account because of incorrect environment-variable filtering (SEC-302).
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 · moderate confidencecPanel before version 67.9999.103 contains a flaw in environment-variable filtering that allows authenticated attackers to execute arbitrary code in the context of the mailman system account, likely through improper sanitization of environment variables passed to system calls.
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< 56.0.52>= 57.9999.48, < 60.0.48>= 61.9999.55, < 62.0.30>= 62.0.31, < 64.0.40>= 64.0.42, < 66.0.23>= 66.0.24, < 67.9999.103CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:L/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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Identify cPanel versionRun 'cat /usr/local/cpanel/version' or check /var/cpanel/cpanel.config for version informationAffected if The installed version matches any of the affected ranges: < 56.0.52; >= 57.9999.48 to < 60.0.48; >= 61.9999.55 to < 62.0.30; >= 62.0.31 to < 64.0.40; >= 64.0.42 to < 66.0.23; >= 66.0.24 to < 67.9999.103
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Verify Mailman mailing list manager is enabledCheck if Mailman is installed and active by running 'rpm -q mailman' or checking /usr/local/cpanel/3rdparty/mailman/ for the Mailman directory structureAffected if Mailman is installed and the cPanel version is in the affected ranges listed above
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Check for suspicious environment variable manipulationReview cPanel access logs in /usr/local/cpanel/logs/ for unusual environment variable patterns or examine /etc/cron.d/mailman for unexpected cron entries related to MailmanAffected if Unusual environment variable patterns or unauthorized Mailman cron jobs exist on a system with an affected cPanel version
A system is affected if it runs any cPanel version prior to 67.9999.103 with Mailman enabled, as the vulnerability allows authenticated attackers to manipulate environment variables to execute code as the mailman system account.
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 data56.0.5260.0.4862.0.30
Update cPanel to version 67.9999.103 or later to patch the environment-variable filtering vulnerability (SEC-302). If immediate patching is not possible, restrict access to cPanel interfaces and monitor for suspicious environment manipulation.
- Consultation4.0 h
- Implementation4.0 h
- Testing8.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-18415 — 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-2017-18415 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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