ElkArte Forum 1.1.9 contains a remote code execution vulnerability that allows authenticated administrators to upload malicious PHP files through the theme installation process. Attackers can upload a ZIP archive with a PHP file containing system commands, which can then be executed by accessing the uploaded file in the theme directory.
https://www.exploit-db.com/exploits/52026
https://github.com/elkarte/Elkarte/releases/download/v1.1.9/ElkArte_v1-1-9_install.zip
Published: 2025-12-11
Updated: 2026-04-15
Base Score: 6.5
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P
Severity: Medium
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: High
Base Score: 8.6
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Severity: High
EPSS: 0.00388