CVE-2026-107432 in Event Post Plugin
Summary
by MITRE • 10/12/2026
Missing Authorization vulnerability in NOUS Ouvert Utile et Simple Event post event-post allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Event post: from n/a through 6.1.1.
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Analysis
by VulDB Data Team • 10/12/2026
The identified security flaw represents a critical failure in access control mechanisms within the NOUS Ouvert Utile et Simple Event application, specifically affecting versions ranging from an unspecified initial release up to version 6.1.1. This vulnerability is classified as a Missing Authorization issue, which fundamentally indicates that the software fails to properly verify whether an authenticated user has the necessary permissions to perform specific actions on requested resources. In this context, the flaw resides within the event-post functionality, allowing attackers to bypass intended security restrictions and execute operations that should be restricted to authorized administrators or users with elevated privileges. This type of vulnerability is commonly associated with Broken Access Control, a category frequently cited in industry standards such as CWE-269: Improper Privilege Management and CWE-862: Missing Authorization. The core technical deficiency lies in the application's inability to enforce server-side checks that validate user roles against requested endpoints, thereby relying on client-side controls or no validation at all for sensitive operations.
From an operational perspective, this vulnerability enables attackers to manipulate system state by creating, modifying, or deleting events without proper authorization. Such capabilities can lead to significant integrity violations within the application's data layer. An attacker could inject malicious content into public-facing event listings, disrupt scheduled activities by removing legitimate entries, or escalate their privileges to gain administrative access if subsequent actions are tied to higher-level permissions. The impact extends beyond mere data manipulation; it compromises the confidentiality and availability of services provided through the platform. For organizations relying on this software for scheduling, communication, or resource management, such a breach can result in reputational damage, operational disruption, and potential compliance violations depending on the sensitivity of the data involved. This aligns with ATT&CK technique T1078: Valid Accounts, where attackers leverage legitimate credentials to perform unauthorized actions due to flawed access control logic rather than credential theft alone.
The exploitation of this vulnerability typically requires an attacker to possess valid user credentials but not necessarily high-level administrative rights initially. By intercepting and modifying HTTP requests directed at the event-post endpoint, a malicious actor can send parameters that trigger privileged functions intended for other roles. This highlights a common architectural weakness where role-based access control is either absent or incorrectly implemented in the backend logic. The lack of robust server-side validation means that any user who can authenticate to the system potentially has the ability to perform actions reserved for administrators, effectively nullifying the security model's integrity. This scenario underscores the importance of implementing strict identity and access management protocols where every request is evaluated against a centralized policy engine before execution.
To mitigate this vulnerability, immediate action must be taken by upgrading the NOUS Ouvert Utile et Simple Event application to version 6.1.2 or later, which presumably contains patches for these access control deficiencies. In addition to patching, organizations should conduct a thorough review of their authentication and authorization workflows to ensure that all sensitive endpoints are protected by robust server-side checks. Implementing principle of least privilege is essential, ensuring that users only have the minimum permissions necessary for their specific roles. Furthermore, integrating automated security testing into the development lifecycle can help detect such flaws early. Security teams should also monitor logs for anomalous activity patterns indicative of unauthorized access attempts or privilege escalation efforts, utilizing intrusion detection systems to alert on suspicious request modifications targeting event management endpoints. Regular penetration testing focused on broken access control scenarios will further strengthen the application's resilience against similar threats in the future.