Authenticated SSRF in Camaleon CMS via Malicious Redirect

Executive Summary

Camaleon CMS versions 2.7.5 through 2.9.1 have a flaw in the Upload from URL media feature. When fetching remote files, the system fails to validate redirect targets properly. Authenticated attackers can exploit this by providing URLs that initially pass validation but redirect to internal network addresses, enabling server-side request forgery (SSRF) attacks against internal services.

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Detection Guidance

Check Camaleon CMS versions between 2.7.5 and 2.9.1 for the Upload from URL feature. Monitor network traffic for unexpected internal requests originating from the CMS server. Review server logs for unusual redirect patterns or SSRF attempts.

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Impact Analysis

If you use Camaleon CMS versions 2.7.5 to 2.9.1, an attacker with valid credentials could trick the system into making unauthorized requests to internal services. This could lead to data leaks, unauthorized access to internal systems, or further exploitation of internal vulnerabilities.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection principles or HIPAA's security requirements. Organizations may face compliance violations, fines, or reputational damage if exploited.

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Mitigation Strategies

Upgrade Camaleon CMS to a version beyond 2.9.1. Disable the Upload from URL feature if not required. Implement network-level restrictions to block internal requests from the CMS server. Apply input validation for redirect targets in the CMS code.

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