CVE-2026-54420

LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn before 5.3.2.0)...

8.5 HighIn KEVPublic exploit

LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn before 5.3.2.0) mishandles symlinks provided by a user with FTP or web shell access on a shared hosting server running CloudLinux/CageFS, as exploited in the wild in May 2026.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.44%Up 1.4 points since Jun 14, 2026

What each source reports

CVE List Score used 8.5

Record: CVE-2026-54420
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-61
Updated: 2026-11-02

EUVDEUVD-2026-36657 8.5

Record: EUVD-2026-36657
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-3g44-c4qc-cxm8 8.5

LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn before 5.3.2.0)...

Record: GHSA-3g44-c4qc-cxm8
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-61
Updated: 2026-11-02

CISA KEV No score

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.

Record: CVE-2026-54420
Weakness: CWE-61
Updated: 2026-11-02

NVD 8.5

Record: CVE-2026-54420
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-61
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	HORKimhab/CVE-2026-54420	2026-06-16
PoC in GitHub	Resellnom/litespeed-cpanel-cve-2026-54420-fix	2026-06-16
PoC in GitHub	mahfuzreham/litespeed-cpanel-cve-2026-54420-fix	2026-06-16
PoC in GitHub	fevar54/CVE-2026-54420-LiteSpeed-Symlink-Exploit	2026-06-18

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-54420 is a high vulnerability (CVSS 8.5) in Litespeed Cpanel Plugin, published June 14, 2026. CISA lists it as known to be exploited, since June 15, 2026. EUVD reports exploitation since June 15, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.44%, the 73rd percentile. No source names a fixed version.