CVE-2021-47964

HIGH

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

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47964. PoCs published by Eren Saraç.

AI-analyzed exploit summary This exploit demonstrates an authenticated RCE vulnerability in Schlix CMS 2.2.6-6 by leveraging the ability to upload a malicious ZIP file containing a modified 'packageinfo.inc' file with embedded PHP code. The code is executed when accessing the 'About' tab of the installed extension.

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.

Exploits (1)

exploitdb WORKING POC
by Eren Saraç · textwebappsmultiple
https://www.exploit-db.com/exploits/49838

This exploit demonstrates an authenticated RCE vulnerability in Schlix CMS 2.2.6-6 by leveraging the ability to upload a malicious ZIP file containing a modified 'packageinfo.inc' file with embedded PHP code. The code is executed when accessing the 'About' tab of the installed extension.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Schlix CMS 2.2.6-6
Auth required
Prerequisites: Authenticated access to the Schlix CMS admin panel · Ability to upload a ZIP file containing a malicious extension
devstral-2 · analyzed May 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-49838
https://www.exploit-db.com/exploits/49838
Product product
Official Product Homepage
https://www.schlix.com/
Third Party Advisory third-party-advisory
VulnCheck Advisory: Schlix CMS 2.2.6-6 Remote Code Execution via core.blockmanager
https://www.vulncheck.com/advisories/schlix-cms-6-remote-code-execution-via-core-blockmanager

Scores

CVSS v3 8.8
EPSS 0.0071
EPSS Percentile 48.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-94
Status published
Products (1)
Schlix/Schlix CMS 2.2.6-6
Published May 15, 2026
Tracked Since May 16, 2026