CVE-2025-21520 Information disclosure in MySQL Cluster

Low 1.8 Published 21 Jan 2025 Updated 3 Nov 2025

High-privileged local attackers can read a subset of MySQL Server data via a difficult-to-exploit vulnerability requiring user interaction.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2025-21520?

CVE-2025-21520 is a low-severity vulnerability in Oracle Mysql Cluster, published on 21 Jan 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Options). Supported versions that are affected are 8.0.40 and prior, 8.4.3 and prior and 9.1.0 and prior. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where MySQL Server executes to compromise MySQL Server. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of MySQL Server accessible data. CVSS 3.1 Base Score 1.8 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N).

Weakness: CWE-732

Which versions are affected by CVE-2025-21520?

It affects 2 products.

Products include Oracle Mysql Cluster, Oracle Mysql Server.

How do I fix CVE-2025-21520?

Apply the vendor's patch.

Is CVE-2025-21520 being exploited?

There is no known exploitation of CVE-2025-21520 in the wild and no public exploit code.

All Oracle Mysql Cluster vulnerabilities

Sources

Also known as GHSA-394g-2wxx-rv2j, MINI-6w2h-qm9j-p52f, MINI-crj6-j678-55q8, MINI-vjp5-mjvh-8733, UBUNTU-CVE-2025-21520.