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6.5

cPanel may run email tasks as unprivileged user

CVE-2017-18477 · published 7 years ago
Summary

In versions of cPanel prior to 62.0.4, the email handling component (Exim) can be made to run under the generic "nobody" account instead of a dedicated system account. This can let attackers influence how email is processed and potentially access other parts of the server. Update cPanel to version 62.0.4 or later, or apply the vendor's security patch, to ensure email services run with proper isolation.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
cpanel cpanel >= 11.54.0.0, < 11.54.0.36
>= 55.9999.61, < 56.0.43
>= 57.9999.48, < 58.0.43
>= 59.9999.58, < 60.0.35
>= 61.9999.55, < 62.0.4
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
Original advisory text
In cPanel before 62.0.4, Exim transports could execute in the context of the nobody account (SEC-206).
In cPanel before 62.0.4, Exim transports could execute in the context of the nobody account (SEC-206).
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
6.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-2547PK - Security Features
Timeline
Published5 Aug 2019
Updated3 Nov 2026
First seen29 Sep 2026
Sources
CVE-2017-18477 · NVD
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