CVE-2026-56290
Confirmed PUBLISHEDJoomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.
- CVE Published
- Jun 29, 2026
- Exploitation Reported
- Jul 07, 2026
- CVSS
- 10.0 Critical
- EPSS
- 0.4%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| joomlack.fr |
JoomlaCK.fr Page Builder CK extension for Joomla
|
1.0-3.6.0 |
Affected |
CVE References
- Product — joomlack.fr joomlack.fr · Product https://www.joomlack.fr/
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2026-07-07 17:00 UTC |
| CVE | 2026-07-07 18:20 UTC |
| All CISA Advisories | 2026-07-07 19:20 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users via the Pro API.
Learn About Virtual PatchesCVSS Scores
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-07-07 17:00:54 UTC · CISA
Proof of concept available
Recorded 2026-07-03 00:52:36 UTC · GitHub
Weaknesses (CWE)
-
Unrestricted Upload of File with Dangerous Type
Recent Mentions
All CISA Advisories · Jul 07, 2026
CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-48908 JoomShaper SP Page Builder Unrestricted Upload of File with Dangerous Type Vulnerability CVE-2026-55255 Langflow Authorization Bypass Through User-Controlled Key Vulnerability CVE-2026-56290 Joomlack Page Builder Improper Access Control Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential addition through CISA’s KEV Nomination Form. Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance.
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2026-07-03 00:52:36 UTC · 1 stars
Page Builder CK for Joomla - Unauthenticated SSRF / Remote File Write leading to PHP execution Exploiter
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
19:20 UTC about 2 hours ago19:20 UTC · about 2 hours ago
KEV confirmed by All CISA Advisories
Exploitation attested by an external source
-
18:20 UTC about 3 hours ago18:20 UTC · about 3 hours ago
KEV confirmed by CVE
Exploitation attested by an external source
-
17:00 UTC about 4 hours ago17:00 UTC · about 4 hours ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
00:52 UTC 5 days ago00:52 UTC · 5 days ago
Public PoC available
Public proof-of-concept code published
-
14:31 UTC 8 days ago14:31 UTC · 8 days ago
CVE published
Vulnerability disclosed publicly
-
11:57 UTC 17 days ago11:57 UTC · 17 days ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-56290
{
"cve_id": "CVE-2026-56290",
"title": "Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder ...",
"affected_vendor": "joomlack.fr",
"affected_product": "JoomlaCK.fr Page Builder CK extension for Joomla",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 10.0,
"epss_score": 0.00356,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}