What request methods would typically be used to elicit this information in a response?

What was fixed in subsequent $7\mathrm{.}4.$x versions of PHP$?$ Where did you find the information?

Of the applicable CVEs that have been identified, which has the highest CVSS $3.$x score? What is the vector string, its score, and severity level?

For this CVE, which metric$($s$)$ result in the CVSS score not being a "perfect" $10\mathrm{.}0?$ Explain why in detail.

In detail, explain why the server might not be vulnerable to exploit code developed for this CVE.