#VU103206 Improper input validation in MySQL Server - CVE-2025-21520

Vulnerability identifier: #VU103206

Vulnerability risk: Low

CVSSv4.0: 0.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21520

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 gain access to sensitive information.

The vulnerability exists due to improper input validation within the Server: Options component in MySQL Server. A local privileged user can exploit this vulnerability to gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MySQL Server: 8.0.0 - 8.0.40, 8.4.0 - 8.4.3, 9.0.0 - 9.0.1, 9.1.0

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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.