CVE-2026-54420 LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following
Attackers with FTP or web shell access can exploit symlink mishandling to escalate privileges or read data on shared hosting servers.
- Exploited in the wild
- Since 15 Jun 2026
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54420?
CVE-2026-54420 is a high-severity path traversal vulnerability in LiteSpeed Technologies cPanel Plugin, published on 14 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-61
Which versions are affected by CVE-2026-54420?
It affects 2 products.
Products include Litespeedtech Litespeed Cpanel Plugin, Litespeedtech Litespeed Whm Plugin.
How do I fix CVE-2026-54420?
No fix has been published for CVE-2026-54420 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 18 Jun 2026.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-54420 being exploited?
Yes. Attackers have exploited CVE-2026-54420 in the wild since at least 15 Jun 2026.
Public exploit code: 4 proofs of concept on GitHub.
Other vulnerabilities in LiteSpeed Technologies cPanel Plugin
Sources
Also known as GHSA-3g44-c4qc-cxm8.