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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has told U.S. federal agencies to secure their servers in four days. This is because of a serious weakness in the LiteSpeed cPanel user-end plugin that is being used in attacks.
This vulnerability, called CVE-2026-48172, lets someone gain higher access due to Redis features not being handled correctly. It was discovered in the lsws.redisAble function.
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The weakness comes from giving wrong permissions that let remote attackers, who have no rights, run any scripts as if they were the system’s main user.
LiteSpeed shared important security updates on Thursday to fix a problem. They told users to update the cPanel user-end plugin (which comes with the WHM plugin) to the newest version.
Users should use this command to check if their server is at risk from CVE-2026-48172 attacks:
grep -rE “cpanel_jsonapi_func=redisAble” /var/cpanel/logs /usr/local/cpanel/logs/ 2>/dev/null
“This vulnerability is being actively exploited, and poses a risk for all user-end plugin versions between v2.3 and v2.4.4,” the LiteSpeed team noted.
“If this command results in any output, we recommend you examine the IPs in the list, determine if they are valid, and if not, block them. To determine any damage done, examine the system logs for any actions taken by the detected IPs.”
On Tuesday, CISA added the security issue to its list of problems used in attacks and told U.S. federal agencies to fix their systems by midnight on Friday, May 29, as required by Binding Operational Directive (BOD) 22-01.
BOD 22-01 is for U.S. federal agencies only. CISA asked all defenders, including businesses, to focus on CVE-2026-48172 patches and fix their servers quickly.
“This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise,” the cybersecurity agency warned.
“Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”
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