CVE-2013-10051: Instantcms

Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days.

A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval() within the search view handler. Specifically, user-supplied input passed via the look parameter is concatenated into a PHP expression and executed without proper sanitation. A remote attacker can exploit this flaw by sending a crafted HTTP GET request with a base64-encoded payload in the Cmd header, resulting in arbitrary PHP code execution within the context of the web server.

Affected products

• Instantcms Instantcms: up to and including 1.6.0

Published 2025-08-01. Last modified 2026-06-16.