June 15, 2026 · Applied Cybernetics Group
CVE-2026-54420 — LiteSpeed cPanel Plugin
LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability
- Added to KEV
2026-06-15- Federal due date
2026-06-18- Vendor
- LiteSpeed
- Product
- cPanel Plugin
- EPSS
- 66.2th percentile (score 0.013, as of
2026-07-13) - NVD CVSS v3.1
- 8.5 (HIGH)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-54420
CISA short description
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.
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.
NVD 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.