VDB-370831 · CVE-2026-54420 · EUVD-2026-36657

LiteSpeed cPanel Plugin up to 2.4.7 symlink

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.6	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in LiteSpeed cPanel Plugin up to 2.4.7. Affected is an unknown function. This manipulation causes symlink. This vulnerability is handled as CVE-2026-54420. The attack can be initiated remotely. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in LiteSpeed cPanel Plugin up to 2.4.7 and classified as critical. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at litespeedtech.com. This vulnerability is known as CVE-2026-54420 since 06/14/2026. The exploitation appears to be difficult. The attack can be launched remotely. Technical details are unknown but an exploit is available.

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 06/15/2026 with a due date of 06/18/2026:

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 BO

Upgrading to version 2.4.8 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-36657). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Hosting Control Software

Vendor

LiteSpeed

Name

cPanel Plugin

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.5
CNA Vector (MITRE): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Symlink
CWE: CWE-61 / CWE-59
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: cPanel Plugin 2.4.8

Timelineinfo

06/14/2026 Advisory disclosed
06/14/2026 +0 days CVE reserved
06/14/2026 +0 days VulDB entry created
06/16/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: litespeedtech.com
Status: Confirmed

CVE: CVE-2026-54420 (🔒)
GCVE (CVE): GCVE-0-2026-54420
GCVE (VulDB): GCVE-100-370831
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/14/2026 08:17
Updated: 06/16/2026 01:37
Changes: 06/14/2026 08:17 (64), 06/14/2026 09:34 (1), 06/16/2026 01:37 (12)
Complete: 🔍
Cache ID: 216::103