What is CVE-2025-21566?

CVE-2025-21566 is a medium-severity vulnerability in Oracle Mysql Server, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 6.5/10. Published 2025-01-21.

How severe is CVE-2025-21566?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Oracle Mysql Server

CVE-2025-21566

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).

EPSS: 0.007 (48.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

secalert_us@oracle.com (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2025-21566?: CVE-2025-21566 is a medium-severity vulnerability in Oracle Mysql Server, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 6.5/10. Published 2025-01-21.
How severe is CVE-2025-21566?: Medium severity. CVSS v3 base score is 6.5 out of 10.