CVE-2025-21521highCWE-770

CVE-2025-21521: high-severity vulnerability in Oracle Corporation MySQL Server

Published · Updated

Follow this CVE+ Monitor MySQL Server

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 1.1%
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).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Oracle Corporation · MySQL Server
Related CVEs — Oracle Corporation MySQL Server

In the same product, most dangerous first.

CVE-2023-21887MEDIUMCVE-2023-21887EPSS 43.4%CVE-2021-2429MEDIUMCVE-2021-2429EPSS 41.5%CVE-2021-2021MEDIUMCVE-2021-2021EPSS 10.0%CVE-2021-2389MEDIUMCVE-2021-2389EPSS 8.1%CVE-2017-3302—CVE-2017-3302EPSS 4.9%CVE-2021-2166MEDIUMCVE-2021-2166EPSS 4.9%