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CpanelApplication

CVE-2020-26110

MEDIUM · 6.1 CVSS v3.1 Published 2020-09-25
Fix available
A fix is available. Upgrade to 88.0.13 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 88.0.13 allows self XSS via DNS Zone Manager DNSSEC interfaces (SEC-564).

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

Self XSS vulnerability in cPanel's DNS Zone Manager DNSSEC interfaces allowing authenticated users to inject malicious scripts through unsanitized input fields, affecting cPanel versions prior to 88.0.13.

MitigationUpgrade cPanel to version 88.0.13 or later to patch the XSS vulnerability in the DNS Zone Manager DNSSEC interfaces. Since this is a self-XSS, the primary risk is to the authenticated user themselves.

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:< 88.0.13

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:3.1/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 installed cPanel version
    Run command: /usr/local/cpanel/cpanel -V or access WHM and view the cPanel version information in the footer
    Affected if Version number is less than 88.0.13 (e.g., 88.0.12, 87.x, 86.x, etc.)
  2. Verify DNS Zone Manager is accessible
    Log into cPanel as a user and navigate to the DNS Zone Manager feature, or check if the user has privileges to access DNSSEC settings in DNS Zone Manager
    Affected if DNS Zone Manager DNSSEC interface is available to the authenticated user
  3. Confirm DNSSEC functionality is enabled
    In cPanel DNS Zone Manager, check if DNSSEC management features are enabled for any hosted zones
    Affected if DNSSEC can be managed on zones - the XSS payload would be injected through DNSSEC-related input fields

You are affected if your cPanel version is below 88.0.13 AND authenticated users have access to the DNS Zone Manager DNSSEC interface where they can input data.

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 88.0.13 or later
Fixed in 88.0.13
Interim mitigation

Upgrade cPanel to version 88.0.13 or later to patch the XSS vulnerability in the DNS Zone Manager DNSSEC interfaces. Since this is a self-XSS, the primary risk is to the authenticated user themselves.

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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dbcve dependency scanner

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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-2020-26110 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