Denial of Service Vulnerability in MySQL Server by Oracle
CVE-2025-21521

7.5HIGH

Key Information:

Vendor

Oracle
Status
Mysql Server
Vendor
CVE Published:
21 January 2025

What is CVE-2025-21521?

A vulnerability in Oracle's MySQL Server, specifically within the Thread Pooling component, allows an unauthenticated attacker to exploit the server over multiple network protocols. This can lead to significant disruptions, including the potential for repeated system crashes, resulting in a denial of service. Affected versions include MySQL Server 8.0.39 and earlier, 8.4.2 and earlier, and 9.0.1 and earlier, necessitating immediate attention and patching to ensure system stability and security.

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Affected Version(s)

MySQL Server * <= 8.0.39

MySQL Server * <= 8.4.2

MySQL Server * <= 9.0.1

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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