CVE-2025-21566: Medium severity oracle mysql vulnerability
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 9.1.0 and prior. Easily exploitable vulnerability allows low privileged 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-21566?
CVE-2025-21566 is classified as an easily exploitable vulnerability that poses a significant risk to affected MySQL Server installations.
How do I fix CVE-2025-21566?
To mitigate CVE-2025-21566, upgrade Oracle MySQL Server to version 9.1.1 or later, as earlier versions are vulnerable.
What versions are affected by CVE-2025-21566?
CVE-2025-21566 affects Oracle MySQL Server versions up to 9.1.0, inclusive.
Who can exploit CVE-2025-21566?
CVE-2025-21566 can be exploited by low privileged attackers with network access via multiple protocols.
What components of MySQL Server are impacted by CVE-2025-21566?
CVE-2025-21566 specifically impacts the Optimizer component of the MySQL Server product.