Oracle APEX Sample Applications up to 24.2.1 Brookstrut Sample App improper authorization

Summaryinfo

A vulnerability was found in Oracle APEX Sample Applications 23.2.0/23.2.1/24.1.0/24.2.0/24.2.1. It has been rated as critical. Impacted is an unknown function of the component Brookstrut Sample App. The manipulation leads to improper authorization. This vulnerability is listed as CVE-2026-21931. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Oracle APEX Sample Applications 23.2.0/23.2.1/24.1.0/24.2.0/24.2.1. This issue affects an unknown function of the component Brookstrut Sample App. 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 confidentiality, integrity, and availability. The summary by CVE is:

Vulnerability in the Oracle APEX Sample Applications product of Oracle APEX (component: Brookstrut Sample App). Supported versions that are affected are 23.2.0, 23.2.1, 24.1.0, 24.2.0 and 24.2.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle APEX Sample Applications. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle APEX Sample Applications, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle APEX Sample Applications accessible data as well as unauthorized read access to a subset of Oracle APEX Sample Applications accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

It is possible to read the advisory at oracle.com. The identification of this vulnerability is CVE-2026-21931 since 01/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/31/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 297229 (Oracle APEX Sample Applications (Brookstrut) (CVE-2026-21931)), 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 (297229) and EUVD (EUVD-2026-3578). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Oracle

Name

• APEX Sample Applications

Version

• 23.2.0
• 23.2.1
• 24.1.0
• 24.2.0
• 24.2.1

License

• commercial

Website

• Vendor: https://www.oracle.com

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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