CVE-2021-47964

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

Published May 15, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Schlix CMS 2.2.6-6 Remote Code Execution via core.blockmanager
First Time appeared Schlix
Schlix cms
Weaknesses CWE-94
CPEs cpe:2.3:a:schlix:cms:2.1.8-7:*:*:*:*:*:*:*
cpe:2.3:a:schlix:cms:2.2.1-3:*:*:*:*:*:*:*
cpe:2.3:a:schlix:cms:2.2.7-2:*:*:*:*:*:*:*
cpe:2.3:a:schlix:cms:2.2.8-1:*:*:*:*:*:*:*
Vendors & Products Schlix
Schlix cms
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
May 18, 2026, 4:02 PM
Reserved
May 15, 2026, 4:30 PM
Status
Deferred
Published
May 15, 2026, 7:16 PM
Modified
Jun 17, 2026, 4:18 AM