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CpanelApplication

CVE-2016-10793

HIGH · 8.8 CVSS v3.0 Published 2019-08-06
Fix available
A fix is available. Upgrade to 11.52.6.6 / 11.54.0.29 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 59.9999.145 allows arbitrary code execution due to an incorrect #! in Mail::SPF scripts (SEC-152).

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

The cPanel application contains a vulnerability in Mail::SPF scripts where an incorrect or missing shebang (#!) line causes the scripts to be executed by an unintended interpreter, potentially allowing authenticated attackers to execute arbitrary code on the server.

MitigationUpgrade cPanel to version 59.9999.145 or later to obtain the patched Mail::SPF module with correct shebang configuration.

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:>= 11.51.9999.98, < 11.52.6.6>= 11.54.0.0, < 11.54.0.29>= 55.9999.61, < 56.0.34>= 57.9999.48, < 58.0.29>= 59.9999.58, < 59.9999.145

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 installed cPanel version
    Run: cat /usr/local/cpanel/version or /var/cpanel/version
    Affected if Version falls within any of these ranges: 11.51.9999.98 to 11.52.6.5, 11.54.0.0 to 11.54.0.28, 55.9999.61 to 56.0.33, 57.9999.48 to 58.0.28, or 59.9999.58 to 59.9999.144
  2. Locate Mail::SPF scripts in cPanel
    Find Perl scripts in the cPanel installation directory related to Mail::SPF, typically under /usr/local/cpanel/Cpanel/Mail/
    Affected if Mail::SPF Perl scripts exist in the cPanel installation directory
  3. Inspect shebang lines in Mail::SPF scripts
    Use 'head -n1' on each Mail::SPF Perl script found, or grep for '^#!' to view all shebang lines
    Affected if Any Mail::SPF script is missing a correct Perl shebang (#!/usr/bin/perl) or uses an incorrect interpreter path

A system is affected if it runs a cPanel version within the vulnerable ranges AND contains Mail::SPF scripts with missing or incorrect shebang lines that could cause unintended interpreter execution.

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 11.52.6.6 / 11.54.0.29 / 56.0.34 or later
Fixed in 11.52.6.611.54.0.2956.0.34
Interim mitigation

Upgrade cPanel to version 59.9999.145 or later to obtain the patched Mail::SPF module with correct shebang configuration.

Fix this in Cpanel Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,930
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.

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-2016-10793 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