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Security Advisory: Plesk PHP Updater Remote Code Execution

This is a security release for AlmaLinux 9, CloudLinux 9. Update the product on every affected server to the patched release — there is no workaround, and unpatched servers remain exposed until updated.

High
Plesk AlmaLinux 9 CloudLinux 9 Debian 12 Ubuntu 22.04

Affected Versions

Plesk Obsidian 18.0.63 and earlier

Patched Version

Plesk Obsidian 18.0.65

Default Update CMD

yum update -y

Fix Commands

AlmaLinux 9 / CloudLinux 9

plesk installer update --select-product-id plesk
plesk sbin packagemng --update

Ubuntu 22.04 / Debian 12

apt update
plesk installer update --select-product-id plesk

What this means under a SharedLicense license

Your SharedLicense license itself is not affected — this is a change in Plesk software, not in licensing. Apply it on every affected server: plesk installer --select-release-current --update-installed. Licenses keep working through updates; nothing needs re-issuing or re-activating.

References

Security Advisories

Related Advisories

Plesk CVE-2026-68492: Untrusted Search Path

2026-09-23 00:00:00

Plesk CVE-2026-87898: OS Command Injection

2026-09-23 00:00:00

cPanel CVE-2026-87899: Privilege Escalation

2026-09-23 00:00:00

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