Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0
97Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 10epss 30%
from disclosure to weapon4 days
Published on NVDJun 29
1st PoC+4d
VulnCheckJun 27
exploitation probability
30%top 2% of all CVEs
observed exploitation
yesVulnCheck
7 public exploit(s)
Action required by CISAfederal deadline: 2026-07-10
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red
Affected products
joomlack.fr · JoomlaCK.fr Page Builder CK extension for Joomlapublic PoCs found — 7
exploitdbwww.exploit-db.com/exploits/52626unverifiedgithubgithub.com/Jenderal92/CVE-2026-56290★ 5githubgithub.com/shinthink/pbck-exploit★ 3githubgithub.com/sagsooz/PageBuilderCK-CVE-2026-56290-Exploit★ 2githubgithub.com/ChiefYoru/CVE-2026-56290_PoC★ 0vulncheckvulncheck.com/xdb/0729778835c6unverifiedvulncheckvulncheck.com/xdb/1e34893b8b9aunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.