Vulnerability details
CVE-2026-56290
Actively exploited
joomlack.fr Page Builder CK extension for Joomla
Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0
CVSS 4.0
10.0Critical
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 10.0Critical | 4.0 | CVEProject cvelistV5 (CNA) (Joomla) | 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
| Vendor | Product | Versions | Source |
|---|---|---|---|
| joomlack.fr | JoomlaCK.fr Page Builder CK extension for Joomla | 1.0-3.6.0 | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://www.joomlack.fr/ product
- https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce/ third-party-advisory
- https://forum.joomlack.fr/index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3 patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56290 government-resource
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Details
- Published
- 2026-06-29
- Last updated
- 2026-10-08
- State
- Published
- Assigner (CNA)
- Joomla
- Kolun priority
- 80 · High
CISA KEV catalog
- Date added
- 2026-07-07
- Due date
- 2026-07-10
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
30.86%
Probability of exploitation in 30 days
98.2%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-434Unrestricted Upload of File with Dangerous Type