Which technique will best address the known vulnerability in a web content management system?

Removing outdated and unsecured images and templates effectively addresses known vulnerabilities in a web content management system by eliminating potential entry points for attackers. Outdated content can often be a source of exposure since it may not receive the same level of security attention or updates as newer components. Attackers frequently exploit known weaknesses in deprecated files or templates, which can include malware or malicious scripts. By removing these outdated elements, you significantly reduce the attack surface that could be exploited, thereby enhancing the overall security posture of the system.

Implementing a web application firewall primarily serves to monitor and filter incoming traffic, which can be beneficial for protecting against various types of attacks. However, it does not directly address the issue of vulnerabilities inherent in outdated content.

Enforcing strict access control policies is crucial for limiting user permissions and protecting sensitive areas of the system, but it does not remediate vulnerabilities that already exist within outdated or unsupported content.

Conducting regular penetration testing is a proactive approach for identifying vulnerabilities, yet it does not resolve any existing security issues; testing merely highlights them without providing immediate fixes. By removing outdated and unsecured images and templates, the fundamental risks associated with those specific vulnerabilities are mitigated without relying on ongoing testing or monitoring mechanisms.