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CpanelApplication

CVE-2018-20867

MEDIUM · 6.1 CVSS v3.0 Published 2019-07-30
Fix available
A fix is available. Upgrade to 76.0.8 or later.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges

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 · unedited
cPanel before 76.0.8 has an open redirect when resetting connections (SEC-462).

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 confidence

cPanel before version 76.0.8 contains an open redirect vulnerability in the connection reset functionality. An attacker could craft a malicious URL that tricks users into visiting an arbitrary website while appearing to remain within the cPanel domain.

MitigationUpgrade cPanel to version 76.0.8 or later. If immediate upgrading is not feasible, restrict access to the connection reset endpoints via firewall rules or authentication controls.

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
CpanelApplication
Affected:< 76.0.8

CVSS 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
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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 checks

Work through these to decide whether this CVE applies to you.

  1. Check cPanel version
    Access the cPanel login page and look for the version displayed in the footer, or run the command: grep -i version /var/cpanel/cpanel.config or cat /usr/local/cpanel/version
    Affected if The installed version is below 76.0.8
  2. Identify connection reset endpoints
    Locate URLs in cPanel related to reset, reconnect, or connection reset functionality - these are typically found under /reset/ or /reconnect/ paths in the cPanel interface
    Affected if Connection reset endpoints are accessible without additional authentication layers
  3. Test for open redirect behavior
    Send a crafted request to a connection reset endpoint with a redirect parameter pointing to an external domain (for example, ?redirect=http://example.com) and observe if the response includes a 30x redirect to that arbitrary domain
    Affected if The server returns a redirect to a domain outside the cPanel hostname

If cPanel version is below 76.0.8 and connection reset endpoints permit arbitrary URL redirection, the environment is affected by CVE-2018-20867

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Upgrade available Upgrade to 76.0.8 or later
Fixed in 76.0.8
Interim mitigation

Upgrade cPanel to version 76.0.8 or later. If immediate upgrading is not feasible, restrict access to the connection reset endpoints via firewall rules or authentication controls.

Fix this in Cpanel Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2018-20867 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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