theopaid Camaleon CMS up to 2.9.1 select_eval instance_eval command permission

Summaryinfo

A vulnerability described as problematic has been identified in theopaid Camaleon CMS up to 2.9.1. The affected element is the function instance_eval of the component select_eval. Such manipulation of the argument command leads to permission. This vulnerability is documented as CVE-2026-66748. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in theopaid Camaleon CMS up to 2.9.1. Affected by this issue is the function instance_eval of the component select_eval. The manipulation of the argument command with an unknown input leads to a permission vulnerability. Using CWE to declare the problem leads to CWE-275. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-66748 since 07/27/2026. The exploitation is known to be easy. The attack may be launched remotely. The exploitation needs additional levels of successful authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/28/2026). This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Content Management System

Vendor

• theopaid

Name

• Camaleon CMS

Version

• 2.9.0
• 2.9.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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