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CpanelApplication

CVE-2016-10801

HIGH · 8.8 CVSS v3.0 Published 2019-08-07
Fix available
A fix is available. Upgrade to 11.54.0.26 / 56.0.27 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable 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 58.0.4 has improper session handling for shared users (SEC-139).

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 58.0.4 contains improper session handling for shared hosting users, allowing potential session hijacking or impersonation between users on the same hosting environment. The vulnerability (SEC-139) stems from insufficient isolation of session data when multiple users share hosting resources.

MitigationUpgrade cPanel to version 58.0.4 or later. For systems that cannot be immediately updated, consider reviewing session management configurations and implementing additional authentication controls for shared hosting 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:>= 11.54.0.0, < 11.54.0.26>= 55.9999.61, < 56.0.27>= 57.9999.48, < 58.0.4

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/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 checks

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

  1. Identify cPanel version
    Run /usr/local/cpanel/cpanel -V or cat /usr/local/cpanel/version
    Affected if Version falls within these ranges: 11.54.0.0 to 11.54.0.25, 55.9999.61 to 56.0.26, or 57.9999.48 to 58.0.3 (versions before 58.0.4)
  2. Confirm this is a shared hosting server
    Check for multiple user accounts: ls /var/cpanel/users/ | wc -l or grep '^ALL_' /etc/domainusers
    Affected if The server hosts more than one cPanel user account (shared hosting)
  3. Verify session data isolation
    Inspect session directory permissions: ls -la /var/cpanel/sessions/ and check if sessions are stored in a centralized location accessible to all users
    Affected if Sessions are stored in a shared location without per-user isolation

You are affected if cPanel version is in the vulnerable ranges AND the server hosts multiple shared hosting users, allowing cross-user session access.

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 11.54.0.26 / 56.0.27 / 58.0.4 or later
Fixed in 11.54.0.2656.0.2758.0.4
Interim mitigation

Upgrade cPanel to version 58.0.4 or later. For systems that cannot be immediately updated, consider reviewing session management configurations and implementing additional authentication controls for shared hosting accounts.

Fix this in Cpanel Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing6.0 h
  • Review / QA3.0 h
15.0 hours of engineering $2,560
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,096.

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-2016-10801 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