What is the severity of CVE-2025-21504?

CVE-2025-21504 is classified as easily exploitable and poses a high risk to affected MySQL Server versions.

How do I fix CVE-2025-21504?

To mitigate CVE-2025-21504, upgrade your MySQL Server to versions 8.0.40 or later, 8.4.3 or later, or 9.0.2 or later.

What versions are affected by CVE-2025-21504?

CVE-2025-21504 affects MySQL Server versions 8.0.39 and prior, 8.4.2 and prior, and 9.0.1 and prior.

Who is at risk for CVE-2025-21504?

High privileged attackers with network access via multiple protocols are at risk of exploiting CVE-2025-21504.

Is there a workaround for CVE-2025-21504?

There are no known effective workarounds for CVE-2025-21504, so upgrading is the recommended course of action.

Vulnerability/
CVE-2025-21504

medium

4.9

CWE

770

EPSS

0.043%

21/1/2025

23/1/2025

CVE-2025-21504

First published: Tue Jan 21 2025(Updated: )

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). 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 high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Credit: secalert_us@oracle.com

Affected Software	Affected Version	How to fix
MySQL Server	<8.0.39<8.4.2<9.0.1

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Reference Links

https://www.oracle.com/security-alerts/cpujan2025.html

Frequently Asked Questions

What is the severity of CVE-2025-21504?
CVE-2025-21504 is classified as easily exploitable and poses a high risk to affected MySQL Server versions.
How do I fix CVE-2025-21504?
To mitigate CVE-2025-21504, upgrade your MySQL Server to versions 8.0.40 or later, 8.4.3 or later, or 9.0.2 or later.
What versions are affected by CVE-2025-21504?
CVE-2025-21504 affects MySQL Server versions 8.0.39 and prior, 8.4.2 and prior, and 9.0.1 and prior.
Who is at risk for CVE-2025-21504?
High privileged attackers with network access via multiple protocols are at risk of exploiting CVE-2025-21504.
Is there a workaround for CVE-2025-21504?
There are no known effective workarounds for CVE-2025-21504, so upgrading is the recommended course of action.

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