Critical SEVERITY — Vulnerability

CVE-2026-54420 — LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability

LiteSpeed cPanel plugin contains a UNIX symbolic link (Symlink) following vulnerability that could allow a user with FTP or web shell access on a shared hosting server running CloudLinux\/CageFS.

Platform
cPanel & WHM
CVE Record
CVE-2026-54420
Advisory
CISA-KEV
Published
15 June 2026
Views
3
Primary source: Review the official advisory at nvd.nist.gov Kaynağa Git

Status

This vulnerability is listed in CISA's catalog of vulnerabilities that have been confirmed as actively exploited. Not a theoretical risk — observed in the wild.

Description

LiteSpeed cPanel plugin contains a UNIX symbolic link (Symlink) following vulnerability that could allow a user with FTP or web shell access on a shared hosting server running CloudLinux\/CageFS.

Advisory Metadata

  • Vendor: LiteSpeed
  • Product: cPanel Plugin
  • Added to catalog: 2026-06-15

Actions Required by CISA

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

  • Deadline for federal agencies: 2026-06-18
LiteSpeed cPanel Plugin

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