CVE-2026-73326 in CamaleonCMS
Summary
by MITRE • 08/12/2026
CamaleonCMS contains a missing authorization vulnerability that allows any authenticated low-privileged user to access and modify plugin settings by reaching four unprotected plugin-administration endpoints without administrator-level authorization. Attackers can manipulate plugin configuration parameters at runtime across the attack, front_cache, cama_meta_tag, and cama_contact_form plugins to alter cached page behavior, modify public meta-tag output, or reconfigure contact forms, enabling account takeover when chained with stored cross-site scripting through the contact form's before_html field.
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Analysis
by VulDB Data Team • 08/12/2026
The vulnerability in CamaleonCMS represents a critical authorization flaw that undermines the application's security model by allowing low-privileged users to bypass administrative controls and manipulate core plugin configurations. This issue stems from four specific endpoints within the plugin administration system that lack proper access control validation, creating an unauthorized entry point for authenticated attackers who can leverage these weaknesses to escalate their privileges and compromise system integrity. The affected endpoints correspond to the attack, front_cache, cama_meta_tag, and cama_contact_form plugins, each providing distinct attack surfaces that when combined create a comprehensive exploitation vector.
The technical implementation of this vulnerability occurs through direct API endpoint access where authenticated users can submit requests to modify plugin settings without proper authentication checks or role validation. The absence of authorization controls means that any user account within the system can perform administrative functions typically restricted to administrators, creating a dangerous privilege escalation scenario. When attackers exploit these endpoints, they gain the ability to manipulate runtime configurations that directly affect how the application processes and delivers content to end users.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it enables attackers to fundamentally alter the application's behavior and security posture. Through manipulation of the front_cache plugin, adversaries can modify cached page content and potentially redirect users to malicious sites while altering the cama_meta_tag plugin settings allows them to control how meta information appears in search engine results and social media shares. The most concerning aspect involves the cama_contact_form plugin where attackers can reconfigure form parameters and inject malicious code into the before_html field, creating a persistent cross-site scripting vulnerability that can persist across multiple user sessions.
This vulnerability demonstrates a clear violation of the principle of least privilege and proper access control implementation, aligning with CWE-285 which addresses insufficient authorization flaws in software systems. The attack chain follows established patterns found in the MITRE ATT&CK framework under the privilege escalation and persistence categories, as attackers can first gain unauthorized access through the missing authorization controls and then establish persistent malicious configurations that survive system restarts. The combination of this authorization bypass with stored XSS in the contact form creates a particularly dangerous exploit scenario where attackers can maintain long-term access to compromised systems while simultaneously affecting all users who interact with the modified contact forms.
The security implications encompass potential account takeover scenarios, data integrity compromise, and service availability issues that could affect thousands of users depending on the application's scale. Organizations running CamaleonCMS are at risk of having their content manipulation capabilities exploited for malicious purposes including defacement, phishing attacks, and credential harvesting through the persistent XSS vulnerability. The lack of proper access control validation across these endpoints creates a systemic weakness that affects not just individual plugin configurations but the overall security architecture of the application.
Mitigation strategies must include immediate implementation of role-based access controls on all plugin administration endpoints, ensuring that only users with appropriate administrative privileges can modify configuration settings. Organizations should implement comprehensive input validation and sanitization for all user-supplied data, particularly in fields like before_html that could contain executable code. Regular security audits and penetration testing should be conducted to identify similar authorization gaps in other parts of the application, while monitoring systems should be deployed to detect unusual administrative activities that might indicate exploitation attempts. Patch management processes must be strengthened to ensure timely deployment of security updates addressing these authorization flaws.
The vulnerability highlights the importance of implementing defense-in-depth strategies where multiple layers of security controls work together to protect against unauthorized access attempts. Proper configuration management and regular security assessments can help identify and remediate similar issues before they can be exploited in production environments. Organizations should also consider implementing web application firewalls and additional monitoring controls specifically designed to detect and prevent unauthorized administrative access patterns that could indicate exploitation of similar authorization vulnerabilities across their infrastructure.