CVE-2026-54420
LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability - [Actively Exploited]
Description
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.
INFO
Published Date :
June 14, 2026, 4:16 a.m.
Last Modified :
June 17, 2026, 10:58 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
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.
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.
Unknown
https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-54420
Affected Products
The following products are affected by CVE-2026-54420
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update LiteSpeed cPanel plugin to version 2.4.8 or later.
- Update LiteSpeed WHM Plugin to version 5.3.2.0 or later.
- Review user access controls and permissions.
Public PoC/Exploit Available at Github
CVE-2026-54420 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-54420.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-54420 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-54420
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
주요 CVE 분석
A vulnerability in LiteSpeed cPanel Plugin before 2.4.8 and 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.
Python
None
Shell
None
Shell
CVE-2026-54420
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54420 vulnerability anywhere in the article.
-
security.nl
Cyberagentschap VS waarschuwt voor actief misbruikt LiteSpeed cPanel-lek
Het Amerikaanse cyberagentschap CISA waarschuwt voor actief misbruik van een kwetsbaarheid in de LiteSpeed cPanel-plug-in waardoor een aanvaller zijn rechten kan verhogen naar die van root. Op 1 juni ... Read more
-
The Hacker News
CISA Flags LiteSpeed cPanel Plugin Flaw Exploited for Root Privilege Escalation
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a security flaw impacting LiteSpeed cPanel Plugin to its Known Exploited Vulnerabilities (KEV) catalog, requiring Federal Civ ... Read more
-
TheCyberThrone
CISA adds Cisco SD-WAN and LiteSpeed cPanel to KEV
June 16, 2026CVE-2026-20262 | Cisco Catalyst SD-WAN Manager — Path TraversalCVE-2026-20262 is a directory or path traversal vulnerability in Cisco Catalyst SD-WAN Manager. This class of flaw allows at ... Read more
The following table lists the changes that have been made to the
CVE-2026-54420 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-54420', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-15T00:00:00+00:00'} -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'LiteSpeed Technologies', 'product': 'cPanel Plugin', 'versions': [{'status': 'affected', 'version': '2.3', 'lessThan': '2.4.8', 'versionType': 'custom'}], 'platforms': ['Linux'], 'packageName': 'WHM and cPanel PlugIn', 'defaultStatus': 'unaffected'}] -
Modified Analysis by [email protected]
Jun. 16, 2026
Action Type Old Value New Value Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420 Types: US Government Resource -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Jun. 15, 2026
Action Type Old Value New Value Added Date Added 2026-06-15 Added Due Date 2026-06-15 Added Required Action 2026-06-15 Added Vulnerability Name 2026-06-15 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 15, 2026
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420 -
Initial Analysis by [email protected]
Jun. 15, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:litespeedtech:litespeed_cpanel_plugin:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.8 *cpe:2.3:a:litespeedtech:litespeed_whm_plugin:*:*:*:*:*:*:*:* versions up to (excluding) 5.3.2.0 Added Reference Type MITRE: https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/ Types: Vendor Advisory Added Reference Type MITRE: https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel Types: Product -
New CVE Received by [email protected]
Jun. 14, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-61 Added Reference https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/ Added Reference https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel