Question: What is CVE-2025-21521?
Answer: CVE-2025-21521 is a vulnerability classified as high with a CVSS score of 7.5. It falls under CWE-770 and affects the system as follows: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Thread Pooling).  Supported versions that are affected are 8.0.39 and prior, 8.4.2 and prior and  9.0.1 and prior. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 7.5 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).