Bolt CMS is affected by an improper rendering flaw that could allow an authenticated attacker to compromise system confidentiality, integrity, and availability.

The application fails to register a SandboxExtension within the Twig environment, which is classified under CWE-1336. An authenticated attacker can exploit this to perform unauthorized actions within the system.

The vulnerability carries a high CVSS score of 8.8, reflecting the potential for full compromise of the application environment. Successful exploitation could allow an attacker to read or modify sensitive content and potentially disrupt system availability, posing a critical risk to the platform.

Immediate Action: Review the Bolt CMS official repository for security patches and upgrade to a version beyond 6.1.

Proactive Monitoring: Monitor server logs for unusual Twig template execution patterns or unexpected changes to content fields.

Compensating Controls: Restrict administrative access to trusted personnel only to minimize the risk of exploitation by authenticated users.

Public Exploit Available: Unknown

Due to the severity of this vulnerability, administrators should prioritize updating the Bolt CMS core to a secure version. Organizations should treat this as a high-priority task to prevent potential exploitation of the template rendering mechanism.