How severe is CVE-2025-21521?

This vulnerability has a severity rating of HIGH with a CVSS score of 7.5 out of 10.

What type of vulnerability is CVE-2025-21521?

This is classified as CWE-770, which is a common weakness in software security.

CVE-2025-21521 - HIGH Severity | CVSS 7.5

Vulnerability 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).

Related Vulnerabilities

CVE-2016-20013

HIGH

CVSS:7.5(High)

sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password.

CWE-7702016

CVE-2016-4074

HIGH

CVSS:7.5(High)

The jv_dump_term function in jq 1.5 allows remote attackers to cause a denial of service (stack consumption and application crash) via a crafted JSON file. This issue has been fixed in jq 1.6_rc1-r0.

CWE-7702016

CVE-2017-11468

HIGH

CVSS:7.5(High)

Docker Registry before 2.6.2 in Docker Distribution does not properly restrict the amount of content accepted from a user, which allows remote attackers to cause a denial of service (memory consumptio...

CWE-7702017

CVE-2017-1227

HIGH

CVSS:7.5(High)

IBM Tivoli Endpoint Manager could allow a unauthorized user to consume all resources and crash the system. IBM X-Force ID: 123906.

CWE-7702017

CVE-2017-12429

HIGH

CVSS:7.5(High)

In ImageMagick 7.0.6-1, a memory exhaustion vulnerability was found in the function ReadMIFFImage in coders/miff.c, which allows attackers to cause a denial of service.

CWE-7702017

CVE-2017-12430

HIGH

CVSS:7.5(High)

In ImageMagick 7.0.6-1, a memory exhaustion vulnerability was found in the function ReadMPCImage in coders/mpc.c, which allows attackers to cause a denial of service.

CWE-7702017