CVE-2026-21931 is a medium-severity vulnerability found in the Oracle APEX Sample Applications, specifically within the Brookstrut Sample App. This issue affects several supported versions, including 23.2.0, 23.2.1, 24.1.0, 24.2.0, and 24.2.1. The vulnerability is characterized as easily exploitable, allowing a low privileged attacker with network access via HTTP to compromise the Oracle APEX Sample Applications.
Successful exploitation of this vulnerability requires human interaction from a person other than the attacker. Although the vulnerability is contained within the Oracle APEX Sample Applications, attacks can potentially impact additional products due to the scope change. The consequences of successful attacks can lead to unauthorized updates, inserts, or deletions of accessible data, as well as unauthorized read access to sensitive information.
With a CVSS score of 5.4, this vulnerability poses a notable risk to organizations utilizing affected versions of the Oracle APEX Sample Applications. Given its potential implications, organizations should prioritize patching immediately.
As of now, there are no known public exploits for this vulnerability, which is a critical point for security teams to consider when evaluating their risk posture.
Organizations running the affected versions of Oracle APEX Sample Applications should take the necessary steps to secure their systems against this vulnerability.
Vulnerability Details
The vulnerability allows a low privileged attacker to exploit Oracle APEX Sample Applications, specifically affecting the Brookstrut Sample App. The CVSS score is classified as medium, with a score of 5.4, indicating moderate impact on confidentiality and integrity. The affected systems include versions 23.2.0, 23.2.1, 24.1.0, 24.2.0, and 24.2.1. The vulnerability was published on January 20, 2026.
Technical Analysis
The root cause of this vulnerability lies in the design of the Oracle APEX Sample Applications, which allows unauthorized access under certain conditions. The attack vector is network-based, requiring an attacker to have network access to the application. The attack complexity is considered low, and while low privileges are required, user interaction is necessary for successful exploitation.
The impacts on confidentiality and integrity are classified as low, meaning that while data exposure could occur, the overall impact is manageable.
Risk & Impact Analysis
Risk to organizations includes the potential for unauthorized access to sensitive data within Oracle APEX Sample Applications. The blast radius could extend beyond the immediate application, potentially affecting associated systems and services.
Given the medium severity of this vulnerability, organizations should address it in their priority patch cycle to mitigate risks associated with unauthorized data manipulation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Oracle APEX Sample Applications include 23.2.0, 23.2.1, 24.1.0, 24.2.0, and 24.2.1. Organizations using these versions should take immediate action to patch and secure their systems.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the latest patches provided by Oracle. Ensure that your systems are updated to versions that have addressed this vulnerability. In addition to patching, organizations can enhance security through configuration hardening and employing network controls.
For further details on effective security measures, organizations can consider penetration testing to assess their security posture.
Detection Guidance
Organizations should monitor logs for unusual access patterns or attempts to exploit the vulnerability. Behavioral anomalies, such as unauthorized data manipulation attempts, should be flagged for further investigation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-21931 emphasizes the need for proactive security measures. Organizations must continuously evaluate their security frameworks to adapt to emerging vulnerabilities. This incident serves as a reminder of the importance of maintaining updated systems and implementing effective security protocols.
For more information on security best practices, consider our resources on penetration testing methodology and vulnerability management programs to strengthen defenses.
Additionally, organizations can benefit from insights on API penetration testing to identify potential vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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