Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Litespeedtech | Litespeed Cpanel Plugin | < 2.4.8 |
| Litespeedtech | Litespeed Whm Plugin | < 5.3.2.0 |
Related Weaknesses (CWE)
References
- https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-pVendor Advisory
- https://www.litespeedtech.com/products/litespeed-web-server/control-panel-supporProduct
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-US Government Resource
FAQ
What is CVE-2026-54420?
CVE-2026-54420 is a vulnerability with a CVSS score of 8.5 (HIGH). 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 Clou...
How severe is CVE-2026-54420?
CVE-2026-54420 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54420?
Check the references section above for vendor advisories and patch information. Affected products include: Litespeedtech Litespeed Cpanel Plugin, Litespeedtech Litespeed Whm Plugin.