CVE-2026-54420LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.5 | HIGH | 3.1mitre (CNA) | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
CISA required action
⚡ Known exploited · remediation due Jun 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 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.
Details
- CVE ID
- CVE-2026-54420
- Status
- Analyzed
- Assigner (CNA)
- mitre
- Published
- Jun 14, 2026
- Last modified
- 2026-07-23 09:10 UTC
- Weaknesses
- CWE-61 · UNIX Symbolic Link (Symlink) Following
Affected Products
As published by the CNA in the CVE record.
LiteSpeed TechnologiescPanel Plugin1 version range
- 2.3 before 2.4.8
References
- blog.litespeedtech.com https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/
- litespeedtech.com https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420