CVE-2025-21521

HIGH

MySQL Server < 8.0.39 - Unauthenticated Denial of Service in Thread Pooling

Title source: llm
STIX 2.1

Description

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).

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0016
EPSS Percentile 36.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (1)
oracle/mysql_server 8.0.0 - 8.0.39
Published Jan 21, 2025
Tracked Since Feb 18, 2026