{"id":"CVE-2026-56290","aliases":["EUVD-2026-40121","GHSA-gxrr-wfg5-xqqf"],"status":"published","title":"Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension \u003c 3.6.0","description":"Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension \u003c 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.","severity":{"version":"4.0","score":10,"vector":"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.30866,"percentile":0.98275,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-284","CWE-434"],"published":"2026-06-29T14:31:37Z","modified":"2026-10-25T21:10:00Z","kev":{"date_added":"2026-07-07","due_date":"2026-07-10","required_action":"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.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-07-07"},{"source":"kev","since":"2026-07-07"}],"exploits":[{"source":"pocgithub","id":"sagsooz/PageBuilderCK-CVE-2026-56290-Exploit","title":"sagsooz/PageBuilderCK-CVE-2026-56290-Exploit","date":"2026-07-03","url":"https://github.com/sagsooz/PageBuilderCK-CVE-2026-56290-Exploit"},{"source":"pocgithub","id":"shinthink/pbck-exploit","title":"shinthink/pbck-exploit","date":"2026-07-04","url":"https://github.com/shinthink/pbck-exploit"},{"source":"exploitdb","id":"EDB-52626","title":"Joomla Page Builder CK  3.5.10 -  Arbitrary File Upload","type":"webapps","platform":"multiple","date":"2026-07-08","url":"https://www.exploit-db.com/exploits/52626"},{"source":"pocgithub","id":"Jenderal92/CVE-2026-56290","title":"Jenderal92/CVE-2026-56290","date":"2026-07-08","url":"https://github.com/Jenderal92/CVE-2026-56290"},{"source":"pocgithub","id":"ChiefYoru/CVE-2026-56290_PoC","title":"ChiefYoru/CVE-2026-56290_PoC","date":"2026-07-19","url":"https://github.com/ChiefYoru/CVE-2026-56290_PoC"},{"source":"pocgithub","id":"katranSefa/CVE-2026-56290","title":"katranSefa/CVE-2026-56290","date":"2026-09-05","url":"https://github.com/katranSefa/CVE-2026-56290"},{"source":"nuclei","id":"CVE-2026-56290","title":"Page Builder CK \u003c= 3.5.10 - Unauthenticated Arbitrary File Upload","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-56290.yaml"}],"products":[{"vendor":"joomlack","product":"page builder"},{"vendor":"joomlack","product":"page_builder_ck"},{"vendor":"joomlack.fr","product":"joomlack.fr page builder ck extension for joomla"}],"references":[{"url":"https://www.joomlack.fr/","tags":["product","Product"]},{"url":"https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce/","tags":["third-party-advisory","Exploit","Third Party Advisory"]},{"url":"https://forum.joomlack.fr/index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3","tags":["patch","Issue Tracking","Patch"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56290","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56290"},{"url":"https://www.joomlack.fr"},{"url":"https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce"},{"url":"https://github.com/advisories/GHSA-gxrr-wfg5-xqqf"}],"sources":{"cve":[{"id":"CVE-2026-56290","title":"Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension \u003c 3.6.0","description":"Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension \u003c 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.","status":"published","published":"2026-06-29T14:31:37.952Z","modified":"2026-10-08T04:47:28.097Z","cvss":[{"version":"4.0","score":10,"vector":"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","level":"critical","assessor":"cna"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T13:36:51.6229Z"}],"euvd":[{"id":"EUVD-2026-40121","description":"Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension \u003c 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.","status":"published","published":"2026-06-29T14:31:37Z","modified":"2026-10-08T04:47:28Z","cvss":[{"version":"4.0","score":10,"vector":"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","level":"critical"}],"exploited_since":"2026-07-07","updated_at":"2026-11-02T17:27:33.098422Z"}],"ghsa":[{"id":"GHSA-gxrr-wfg5-xqqf","title":"The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload...","description":"The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.","status":"published","published":"2026-06-29T15:32:07Z","modified":"2026-07-07T21:32:33Z","cvss":[{"version":"4.0","score":10,"vector":"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","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-284","CWE-434"],"updated_at":"2026-11-02T15:09:18.783285Z"}],"kev":[{"id":"CVE-2026-56290","title":"Joomlack Page Builder Improper Access Control Vulnerability","description":"Joomlack Page Builder contains an improper access control vulnerability that could allow for remote code execution via unauthenticated arbitrary file upload.","cwes":["CWE-284"],"kev":{"date_added":"2026-07-07","due_date":"2026-07-10","required_action":"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.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-56290","description":"Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension \u003c 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.","status":"published","published":"2026-06-29T15:16:42.36Z","modified":"2026-10-25T21:10:00.77Z","cvss":[{"version":"4.0","score":10,"vector":"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","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:12:26.508751Z"}]}}