CVE-2026-56290: joomlack page builder ck

csirt@kutim:~/threat-intel/cve/CVE-2026-56290

CVSS 9.8 · Critical KEV · sudah dieksploitasi EPSS 30,9%

Kerentanan Unrestricted Upload of File with Dangerous Type pada joomlack page builder ck. Skor CVSS 3.1 9.8 (Critical) menurut NVD. Masuk katalog KEV CISA pada 7 Juli 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

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.

Advisory KUTIM-CSIRT

Peringatan Keamanan: Rekap 37 Kerentanan Kritis pada Ekstensi Joomla (15 Agustus-30 September 2026) 1 Okt 2026

Rincian

Terbit di NVD: 29 Juni 2026
Terakhir diubah: 7 Oktober 2026
Status NVD: Analyzed
CVSS 3.1: 9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-434: Unrestricted Upload of File with Dangerous Type
EPSS (30 hari): 30,9% peluang dieksploitasi; lebih tinggi dari 98,2% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama: Joomlack Page Builder Improper Access Control Vulnerability
Masuk KEV: 7 Juli 2026
Tenggat CISA: 10 Juli 2026 (untuk instansi federal AS)
Ransomware: Belum tercatat
Tindakan wajib: 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.

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
joomlack	page builder ck	Semua versi sebelum 3.6.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://forum.joomlack.fr/index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3 issue tracking · patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56290 pemerintah AS
https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce/ exploit · advisory pihak ketiga
https://www.joomlack.fr/ product

Sumber: NVD · CVE.org · KEV CISA · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 8 Okt 2026, 06:25 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.