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High · 8.8 CVE-2021-47964 EUVD-2021-34817GHSA-r3mq-4wxp-p8vq

Schlix CMS 2.2.6-6 Remote Code Execution via core.blockmanager

Published May 15, 2026 · Updated May 18, 2026 · Assigned by VulnCheck

Description

Schlix CMS 2.2.6-6 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary PHP code by uploading malicious extension packages through the block manager. Attackers can upload a crafted ZIP file containing PHP code in the packageinfo.inc file and trigger execution by accessing the About tab of the installed extension.

Affected products

VendorProductAffectedFixed
Schlix Schlix CMS 2.2.6-6 —

References