Advantech WebAccess/VPN < 1.1.5 Command Injection in AppManagementController

Advisories

severity: high
date: November 6, 2025
Affecting: WebAccess/VPN < 1.1.5
CVE: CVE-2025-34239
CWE: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS: 8.6
CVSS V4 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
References: Advantech Advisory
Credit: Alex Williams from Pellera Technologies
Description: Advantech WebAccess/VPN versions prior to 1.1.5 contain a command injection vulnerability in AppManagementController.appUpgradeAction() that allows an authenticated system administrator to execute arbitrary commands as the web server user (www-data) by supplying a crafted uploaded filename.