CVE-2016-9553: Sophos Web Appliance

High severity, CVSS 7.2. EPSS: 19.5% chance of exploitation in the next 30 days.

The Sophos Web Appliance (version 4.2.1.3) is vulnerable to two Remote Command Injection vulnerabilities affecting its web administrative interface. These vulnerabilities occur in the MgrReport.php (/controllers/MgrReport.php) component responsible for blocking and unblocking IP addresses from accessing the device. The device doesn't properly escape the information passed in the variables 'unblockip' and 'blockip' before calling the shell_exec() function which allows for system commands to be injected into the device. The code erroneously suggests that the information handled is protected by utilizing the variable name 'escapedips' - however this was not the case. The Sophos ID is NSWA-1258.

Affected products

• Sophos Web Appliance: version 4.2.1.3 only

Published 2017-01-28. Last modified 2026-06-17.