Azure Database for PostgreSQL Flexible Server Extension Elevation of Privilege Vulnerability

How could an attacker exploit this vulnerability?
An attacker with the administrator role of "azure_pg_admin" in the target environment could exploit this vulnerability to gain the same privileges as a SuperUser by sending a specially crafted request to an Azure Database for PostgreSQL Flexible Server with specific non-default functionality enabled.

According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires the attacker to have administrator privileges on the target system.

What privileges could be gained by an attacker who successfully exploited the vulnerability?
An attacker who successfully exploits this vulnerability would gain the same privileges as the SuperUser role.

Security updates
16.4 — https://learn.microsoft.com/en-us/azure/postgresql/flexible-server/release-notes