#VU103204 Improper input validation in MySQL Server - CVE-2025-21494

Vulnerability identifier: #VU103204

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21494

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
MySQL Server
Server applications / Database software

Vendor: Oracle

Description

The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the Server: Security: Privileges component in MySQL Server. A local privileged user can exploit this vulnerability to perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MySQL Server: 8.0.0 - 8.0.39, 8.4.0 - 8.4.2, 9.0.0 - 9.0.1

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External links
https://www.oracle.com/security-alerts/cpujan2025.html

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.