Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and 9.0.0-9.3.0. 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 remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7691-1 advisory.

    Multiple security issues were discovered in MySQL and this update includes new upstream MySQL versions to     fix these issues.

    MySQL has been updated to 8.0.43 in Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. Ubuntu 25.04 has been updated     to MySQL 8.4.6.

    In addition to security fixes, the updated packages contain bug fixes, new features, and possibly     incompatible changes.

    Please see the following for more information:

    https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-43.html     https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-6.html https://www.oracle.com/security-     alerts/cpujul2025.html

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported     versions that are affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and 9.0.0-9.3.0. 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. (CVE-2025-50091)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of mysql installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-50091 advisory.

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported     versions that are affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and 9.0.0-9.3.0. 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. (CVE-2025-50091)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The versions of MySQL Server installed on the remote host are affected by a multiple vulnerabilities as referenced in the July 2025 CPU advisory.

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).  Supported versions that     are affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and  9.0.0-9.3.0. 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. (CVE-2025-50101)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).  Supported versions that     are affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and  9.0.0-9.3.0. 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. (CVE-2025-50102)

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL).  Supported versions that are     affected are 8.0.0-8.0.42, 8.4.0-8.4.5 and  9.0.0-9.3.0. 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 partial denial of service (partial DOS) of MySQL     Server. (CVE-2025-50104)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
249333	Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : MySQL vulnerabilities (USN-7691-1)	Nessus	Ubuntu Local Security Checks	medium
248670	Linux Distros Unpatched Vulnerability : CVE-2025-50091	Nessus	Misc.	medium
244811	CBL Mariner 2.0 Security Update: mysql (CVE-2025-50091)	Nessus	MarinerOS Local Security Checks	medium
242316	Oracle MySQL Server 9.0.x < 9.4.0 (July 2025 CPU)	Nessus	Databases	medium
242313	Oracle MySQL Server 8.0.x < 8.0.43 (July 2025 CPU)	Nessus	Databases	medium
242312	Oracle MySQL Server 8.4.x < 8.4.6 (July 2025 CPU)	Nessus	Databases	medium

Detections

Analytics

CVE-2025-50091

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium