What is CVE-2025-21521?

CVE-2025-21521 is a high-severity vulnerability in Oracle Mysql_server, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-01-21.

How severe is CVE-2025-21521?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2025-21521 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Oracle Mysql_server

CVE-2025-21521

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 unauth…

EPSS: 0.010 (59.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

adegoodyer/kubernetes-admin-toolkit

References

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

Frequently asked questions

What is CVE-2025-21521?: CVE-2025-21521 is a high-severity vulnerability in Oracle Mysql_server, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2025-01-21.
How severe is CVE-2025-21521?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-21521 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.