Published: May 23, 2026
Status: Reviewed and remediated
Client action required: No
Reliable Penguin has completed a review of all managed WHM/cPanel servers in response to the recently disclosed LiteSpeed cPanel plugin vulnerability, tracked as CVE-2026-48172.
This vulnerability affects certain versions of the LiteSpeed User-End cPanel Plugin and may allow privilege escalation on impacted systems. The issue does not affect every WHM/cPanel server, but it is relevant to environments where the affected LiteSpeed cPanel user-end plugin was installed.
As part of our managed security response, Reliable Penguin has:
- Reviewed all managed WHM/cPanel servers for exposure.
- Identified whether the affected LiteSpeed cPanel plugin was present.
- Applied appropriate vendor patches and/or mitigations where needed.
- Confirmed that no client-side action is required at this time.
LiteSpeed web service functionality is not expected to be impacted by the mitigation steps. Websites using LiteSpeed or LiteSpeed Cache should continue to operate normally.
We will continue monitoring vendor advisories and security updates related to this issue. If any additional action becomes necessary for a managed server, Reliable Penguin will handle it directly or contact affected clients with specific instructions.
For questions, please contact Reliable Penguin Support.
Summary: Reliable Penguin has reviewed all managed WHM/cPanel servers for CVE-2026-48172 and applied appropriate patches and/or mitigations. No client action is necessary at this time.
