CVE-2026-66748 — Camaleon CMS 2.1.1 - 2.9.1 Authenticated RCE via select_eval Custom Field
Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with custom_fields manage permission to execute arbitra…
Published: 2026-07-28 · CVSS: 8.7 · CVSS 4.0
Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with custom_fields manage permission to execute arbitrary Ruby code by supplying a malicious expression through the select_eval custom field type. Attackers can store an attacker-controlled Ruby expression in the field options command parameter, which is evaluated via instance_eval within an ERB view whenever a post edit page is rendered, achieving server-side code execution with web server process privileges.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7