Read the docs
TI-2021-22577 Aliases CVE-2021-47964GHSA-r3mq-4wxp-p8vq

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

Priority HIGH 73CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0071 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SchlixSchlix CMS2.2.6-6—No fix listedCNA
  • Schlix CMS VendorSchlix Affected 2.2.6-6 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47964
  2. 2026-10-03 Alias added: GHSA-r3mq-4wxp-p8vq

References

Exploit 1

Other 2

  • TI-2023-15102 An arbitrary file upload vulnerability in Schlix CMS v2.2.8-1, allows remote… CVSS 3.1HIGH 7.2
  • TI-2022-22487 Insecure Permission vulnerability in Schlix Web Inc SCHLIX CMS 2.2.7-2 allows attacker to… CVSS 3.1HIGH 8.8
  • TI-2019-08238 admin/app/mediamanager in Schlix CMS 2.1.8-7 allows Authenticated Unrestricted File… CVSS 3.1HIGH 7.2
  • TI-2025-41216 Schlix CMS before v2.2.9-5 is vulnerable to Cross Site Scripting (XSS). CVSS 3.1MEDIUM 6.1
  • TI-2021-22449 Schlix CMS 2.2.6-6 - 'title' Persistent Cross-Site Scripting (Authenticated) CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences