CVE-2026-54420
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.
How to fix
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.
CISA due date: Jun 18, 2026- litespeedtech litespeed_cpanel_plugin2.4.8 or later
- litespeedtech litespeed_whm_plugin5.3.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| litespeedtech litespeed_cpanel_plugin | v < 2.4.8 | 2.4.8 |
| litespeedtech litespeed_whm_plugin | v < 5.3.2.0 | 5.3.2.0 |
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Attack Surface Management
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