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Security Advisory: cPanel / CSF Plugin

This is a security release for cPanel & WHM. Update the product on every affected server to the patched release — `sudo /scripts/upcp --force` — there is no workaround, and unpatched servers remain exposed until updated.

Critical
cPanel CSF AlmaLinux 8 AlmaLinux 9 CentOS 7 CloudLinux 7

Affected Versions

16.20-1 and earlier

Patched Version

16.30-1

Default Update CMD

yum update -y

Fix Commands

CentOS 7 / CloudLinux 7

yum clean all
/scripts/update-packages

AlmaLinux / CloudLinux 8/9/10

dnf clean metadata
/scripts/update-packages

What this means under a SharedLicense license

Your SharedLicense license itself is not affected — this is a change in cPanel & WHM software, not in licensing. Apply it on every affected server: sudo /scripts/upcp --force. Licenses keep working through updates; nothing needs re-issuing or re-activating.

Multiple vulnerabilities were found in the ConfigServer Firewall (CSF) plugin. Exploiting the vulnerabilities could allow an attacker to gain root access.

References

Security Advisories

Related Advisories

EasyApache 4 25.86 — cPanel & WHM Update

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ConfigServer Security & Firewall (CSF) 16.32-1 — cPanel & WHM Update

2026-09-30

Sitejet Builder 4.13.1-1 — cPanel & WHM Update

2026-09-30

Check your system for vulnerabilities

Select your product and operating system to see the exact fix commands that apply to you.

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