dbcve.org
CpanelApplication

CVE-2021-26266

HIGH · 7.5 CVSS v3.1 Published 2021-01-26
Fix available
A fix is available. Upgrade to 92.0.9 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 92.0.9 allows a Reseller to bypass the suspension lock (SEC-578).

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 92.0.9 contains an authorization bypass vulnerability where a Reseller-level user can bypass the suspension lock mechanism (SEC-578), potentially allowing access to or manipulation of suspended accounts that should be restricted.

MitigationUpgrade cPanel to version 92.0.9 or later to obtain the vendor patch, then verify the suspension lock functionality works correctly for reseller-managed accounts.

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:< 92.0.9

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
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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. Identify cPanel version
    Access WHM and navigate to Server Status > cPanel Version, or run 'cat /usr/local/cpanel/version' via command line as root
    Affected if The displayed version number is below 92.0.9
  2. Confirm reseller-level accounts exist
    Log into WHM as administrator and navigate to Reseller Center > View Resellers, or run 'whmapi1 listresellers' via command line
    Affected if Any reseller accounts are present in the system
  3. Check suspension lock status for resellers
    In WHM, go to Reseller Center > Manage Reseller Suspension Locks, or inspect the reseller configuration via 'whmapi1 resellerstats' for each reseller
    Affected if Suspension lock is enabled for any reseller account, and that reseller can still access or manipulate suspended accounts
  4. Test suspension lock bypass
    As a reseller user, attempt to access or perform operations on an account that has been suspended by the administrator with the suspension lock feature active
    Affected if The reseller can access or manipulate a suspended account despite the suspension lock being enabled

You are affected if cPanel version is below 92.0.9 and reseller accounts with suspension lock enabled exist in the environment, allowing those resellers unauthorized access to suspended accounts.

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 92.0.9 or later
Fixed in 92.0.9
Interim mitigation

Upgrade cPanel to version 92.0.9 or later to obtain the vendor patch, then verify the suspension lock functionality works correctly for reseller-managed accounts.

Fix this in Cpanel Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,040
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2021-26266 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2021-26266 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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