SB2026061665 - Privilege escalation in LiteSpeed User-End cPanel Plugin

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Main Vulnerability Database SB2026061665

SB2026061665 - Privilege escalation in LiteSpeed User-End cPanel Plugin

Published: June 16, 2026

Security Bulletin ID SB2026061665
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Critical 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-54420)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Red


The vulnerability allows a remote user to escalate privileges to root.

The vulnerability exists due to improper access control in the LiteSpeed cPanel user-end plugin when handling cPanel JSON API requests. A remote user can invoke crafted requests to vulnerable plugin functionality to escalate privileges to root.

Exploitation requires FTP access or web shell access on shared hosting servers running CloudLinux/CageFS.

Note, the vulnerability is being actively exploited in the wild.


Remediation

Install update from vendor's website.

References