Oracle MySQL Server up to 7.6.32/8.0.40/8.4.3/9.1.0 Optimizer improper authorization

Summaryinfo

A vulnerability, which was classified as critical, was found in Oracle MySQL Server up to 7.6.32/8.0.40/8.4.3/9.1.0. The affected element is an unknown function of the component Optimizer. Such manipulation leads to improper authorization. This vulnerability is documented as CVE-2025-21518. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Oracle MySQL Server up to 7.6.32/8.0.40/8.4.3/9.1.0. Affected by this issue is some unknown functionality of the component Optimizer. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.40 and prior, 8.4.3 and prior and 9.1.0 and prior. Easily exploitable vulnerability allows low 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

The advisory is available at oracle.com. This vulnerability is handled as CVE-2025-21518 since 12/25/2024. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 12/03/2025). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 214536 (Oracle MySQL Cluster 7.6.x < 7.6.33 (January 2025 CPU)), 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 (214536) and CERT Bund (WID-SEC-2025-0167). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Oracle MySQL
• Debian Linux
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• NetApp ActiveIQ Unified Manager
• RESF Rocky Linux
• MariaDB MariaDB

Productinfo

Type

• Database Software

Vendor

• Oracle

Name

• MySQL Server

Version

• 7.6.0
• 7.6.1
• 7.6.2
• 7.6.3
• 7.6.4
• 7.6.5
• 7.6.6
• 7.6.7
• 7.6.8
• 7.6.9
• 7.6.10
• 7.6.11
• 7.6.12
• 7.6.13
• 7.6.14
• 7.6.15
• 7.6.16
• 7.6.17
• 7.6.18
• 7.6.19
• 7.6.20
• 7.6.21
• 7.6.22
• 7.6.23
• 7.6.24
• 7.6.25
• 7.6.26
• 7.6.27
• 7.6.28
• 7.6.29
• 7.6.30
• 7.6.31
• 7.6.32
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4
• 8.0.5
• 8.0.6
• 8.0.7
• 8.0.8
• 8.0.9
• 8.0.10
• 8.0.11
• 8.0.12
• 8.0.13
• 8.0.14
• 8.0.15
• 8.0.16
• 8.0.17
• 8.0.18
• 8.0.19
• 8.0.20
• 8.0.21
• 8.0.22
• 8.0.23
• 8.0.24
• 8.0.25
• 8.0.26
• 8.0.27
• 8.0.28
• 8.0.29
• 8.0.30
• 8.0.31
• 8.0.32
• 8.0.33
• 8.0.34
• 8.0.35
• 8.0.36
• 8.0.37
• 8.0.38
• 8.0.39
• 8.0.40
• 8.4.0
• 8.4.1
• 8.4.2
• 8.4.3
• 9.0
• 9.1.0

License

• open-source

Website

• Vendor: https://www.oracle.com

CPE 2.3info

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CPE 2.2info

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CVSSv4info

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Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

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Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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