Oracle MySQL Server up to 9.1.0 Optimizer improper authorization

Summaryinfo

A vulnerability categorized as critical has been discovered in Oracle MySQL Server up to 9.1.0. Affected by this vulnerability is an unknown functionality of the component Optimizer. Executing a manipulation can lead to improper authorization. This vulnerability is tracked as CVE-2025-50089. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Oracle MySQL Server up to 9.1.0. It has been declared as problematic. This vulnerability affects an unknown functionality of the component Optimizer. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect availability. CVE summarizes:

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 9.0.0-9.1.0. Easily exploitable vulnerability allows high privileged 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

The advisory is shared for download at oracle.com. This vulnerability was named CVE-2025-50089 since 06/12/2025. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/02/2025). The MITRE ATT&CK project declares the attack technique as T1548.002.

The vulnerability scanner Nessus provides a plugin with the ID 249820 (Linux Distros Unpatched Vulnerability : CVE-2025-50089), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (249820) and CERT Bund (WID-SEC-2025-1567). Once again VulDB remains the best source for vulnerability data.

Affected

• Red Hat Enterprise Linux
• Oracle MySQL
• Ubuntu Linux
• Oracle Linux
• RESF Rocky Linux
• Xerox FreeFlow Print Server

Productinfo

Type

• Database Software

Vendor

• Oracle

Name

• MySQL Server

Version

• 9.0
• 9.1.0

License

• open-source

Website

• Vendor: https://www.oracle.com

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Once again VulDB remains the best source for vulnerability data.

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