CVE-2026-25329 identifies a missing authorization vulnerability in the Quiz And Survey Master plugin developed by ExpressTech Systems, affecting versions up to and including 10.3.4. The vulnerability stems from incorrectly configured access control mechanisms within the plugin, which fail to properly verify whether a user has the necessary permissions before allowing certain actions. This missing authorization flaw means that unauthorized users, potentially including unauthenticated attackers or low-privileged users, could exploit the plugin to perform operations that should be restricted, such as modifying quizzes, accessing sensitive survey data, or manipulating survey results. The vulnerability does not require prior authentication or user interaction, increasing its risk profile. Although no known exploits are currently reported in the wild, the flaw's presence in a widely used WordPress plugin makes it a significant concern. The lack of a CVSS score complicates severity assessment, but the nature of the vulnerability suggests a high risk due to the potential impact on confidentiality and integrity of survey data. The plugin is commonly used in educational, corporate, and research environments for gathering and managing survey data, making the potential impact broad. The vulnerability was published in February 2026, with no patches currently linked, indicating that organizations must proactively monitor vendor updates and implement interim controls. The missing authorization issue highlights the importance of rigorous access control validation in web applications, especially those handling sensitive user-generated content.

For European organizations, the impact of CVE-2026-25329 can be significant, particularly for entities relying on the Quiz And Survey Master plugin for collecting and managing sensitive data such as educational assessments, customer feedback, or employee surveys. Unauthorized access could lead to data breaches exposing personal or confidential information, manipulation of survey results undermining data integrity, and potential reputational damage. Educational institutions, research organizations, and enterprises using this plugin may face compliance risks under GDPR if personal data is compromised. The vulnerability could also facilitate lateral movement within networks if attackers leverage the plugin as an entry point. Given the plugin's integration with WordPress, a popular CMS in Europe, the attack surface is considerable. The absence of known exploits currently provides a window for mitigation, but the risk of future exploitation remains high. The impact on availability is likely limited but cannot be ruled out if attackers disrupt survey functionality or delete data.

Organizations should immediately audit their use of the Quiz And Survey Master plugin and restrict administrative access to trusted personnel only. Until an official patch is released, consider disabling or uninstalling the plugin if feasible. Implement strict role-based access controls within WordPress to limit who can manage or interact with the plugin's features. Monitor logs for unusual activity related to survey creation, modification, or data export. Employ web application firewalls (WAFs) with custom rules to detect and block unauthorized attempts to access plugin endpoints. Regularly check for vendor updates and apply patches promptly once available. Conduct security awareness training for administrators managing WordPress plugins to recognize potential exploitation attempts. Additionally, consider isolating survey data storage and applying encryption to mitigate data exposure risks. Finally, perform penetration testing focused on access control mechanisms to identify similar authorization issues in other plugins or custom code.