Which of the following steps should be taken before mitigating a vulnerability in a production server?

While escalating the issue to the Software Development Life Cycle (SDLC) team may be necessary for certain vulnerabilities, it is not a prerequisite step before mitigation. The SDLC team typically focuses on development processes rather than immediate vulnerability management, making this option less relevant in the context of production server vulnerabilities.

The Incident Response (IR) plan is critical for managing incidents, but it is not specifically designed for evaluating changes related to vulnerability mitigation. Instead, the IR plan outlines procedures for responding to security incidents, which may occur after a vulnerability is identified rather than as part of the change management process.

Performing a risk assessment is an important step in understanding the implications of a vulnerability; however, it should occur after the change management policy has been consulted. The classification of vulnerabilities can guide mitigation efforts, but it is essential to align these efforts with established change management protocols first.