CVE-2026-54420
High 8.5 Exploited in the wild (KEV)
Confirmed active exploitation — CISA KEV catalog
- Name
- LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- 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.
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.
Metrics
- CVSS 3.1
-
8.5 (HIGH)
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 1% (percentile: 73) as of 1 November 2026
- CWE
- CWE-61
Affected products
litespeedtech: litespeed cpanel plugin; litespeedtech: litespeed whm plugin