CVE-2021-47964 - CVE House
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Status published High CVE-2021-47964

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

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Eren Saraç

Affected Vendor

Affected Software

Schlix CMS
Vulnerable Versions:
2.2.6-6

Timeline

Official Publish: May 15th, 2026
Last Modified: May 18th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)