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CVE-2026-56290

99
FAUCET Score

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.

First published: Jun 29, 2026Last modified: Jul 23, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 3.6.0CPE matchmatch criteria
cpe:2.3:a:joomlack:page_builder_ck:*:*:*:*:*:joomla\!:*:*

CVSS Data

CVSS version used by this source: 4.0

10.0CRITICAL

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Red

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
HIGH
SS Integrity
HIGH
SS Availability
HIGH
Exploit Maturity
ATTACKED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
83.25%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Jul 7, 2026
ExploitDB: EDB-52626 · Jul 8, 2026
This CVE's current EPSS score of 0.8325 is in the 98th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

forum.joomlack.fr / index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3
Issue TrackingPatch
mysites.guru / blog/pagebuilderck-unauthenticated-file-upload-rce
ExploitThird Party Advisory
cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
joomlack.fr
Product