Read the docs
TI-2026-40655 Aliases CVE-2026-56290GHSA-gxrr-wfg5-xqqf

Unrestricted file upload in JoomlaCK.fr Page Builder CK extension for Joomla

Priority CRITICAL 100Exploited in the wildCWE-434Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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-434.

Summary

Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0 - The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.

Why it matters now

Exploitation Active In CISA KEV since 2026-07-07CISA due date 2026-07-10
EPSS 0.30866 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
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
joomlack.frJoomlaCK.fr Page Builder CK extension for Joomla1.0-3.6.0—No fix listedCNA
  • JoomlaCK.fr Page Builder CK extension for Joomla Vendorjoomlack.fr Affected 1.0-3.6.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:joomlack:page_builder_ck:*:*:*:*:*:joomla\!:*:*before 3.6.0VulnerableJoomlack
  • cpe:2.3:a:joomlack:page_builder_ck:*:*:*:*:*:joomla\!:*:* Versions before 3.6.0 Vulnerable ·Joomlack

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-07-07 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2026-56290
  3. 2026-10-03 Alias added: GHSA-gxrr-wfg5-xqqf
  4. 2026-10-07 CISA SSVC decision points changed

References

Exploit 1

Patch 1

Other 1

  • TI-2026-54269 SQL injection in joomlack.fr Page Builder CK extension for Joomla CVSS 4.0CRITICAL 9.3
  • TI-2026-52039 SQL injection in joomlack.fr Page Builder CK extension for Joomla CVSS 4.0CRITICAL 9.3
  • TI-2026-44533 Improper access control in joomlack.fr Page Builder CK extension for Joomla CVSS 3.1CRITICAL 9.1
  • TI-2026-45024 Unrestricted file upload in joomlack.fr Page Builder CK extension for Joomla CVSS 4.0CRITICAL 9.4
  • TI-2026-54268 Cross-site scripting in joomlack.fr Page Builder CK extension for Joomla CVSS 4.0MEDIUM 5.3

Sources

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