CVE-2026-54420: LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability

High severity, CVSS 8.5. Actively exploited: in CISA KEV since 2026-06-15. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• Litespeedtech LiteSpeed cPanel Plugin: before 2.4.8 (fixed in 2.4.8)
• Litespeedtech LiteSpeed WHM Plugin: before 5.3.2.0 (fixed in 5.3.2.0)

Published 2026-06-14. Last modified 2026-07-23.