CVE-2026-69703 in Atals-Livre
Summary
by MITRE • 08/04/2026
Atlas-Livre contains an improper access control vulnerability in the admin controllers under Espace_admin/controleur/ that allows unauthenticated attackers to bypass session-based authentication guards by sending raw HTTP requests that ignore redirects. Attackers can invoke destructive admin actions such as record deletion by requesting controller endpoints with GET parameters like supp, because the PHP header() redirect is never followed by an exit or die call, allowing all subsequent code including database operations to execute regardless of session state.
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Analysis
by VulDB Data Team • 08/04/2026
This vulnerability resides within the Atlas-Livre content management system where improper access control has been identified in the administrative controller components located under Espace_admin/controleur/. The flaw manifests as a critical authorization bypass that enables unauthenticated attackers to circumvent the session-based authentication mechanisms that should normally protect administrative functions. The root cause stems from inadequate implementation of security controls within the PHP application logic where HTTP redirects are not properly terminated with exit or die statements, creating a pathway for malicious execution.
The technical exploitation occurs through direct HTTP request manipulation where attackers can bypass the intended authentication flow by sending raw requests that ignore standard redirect behaviors. This vulnerability specifically affects endpoints within the administrative interface where destructive operations such as record deletion can be invoked through simple GET parameter manipulation. The attacker can target controller endpoints with parameters like supp which triggers database operations without proper session validation, allowing unauthorized modification of system data.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass full administrative control over the affected system components. Attackers can execute destructive actions including but not limited to record deletion, data manipulation, and potentially system compromise through the exploitation of these unprotected administrative endpoints. The vulnerability represents a classic case of insufficient input validation and improper session management, creating an environment where authentication checks become ineffective due to missing termination points in the execution flow.
Security implications align with CWE-285 which addresses improper authorization issues within applications, and this particular scenario also maps to ATT&CK technique T1078 for valid accounts usage and T1499 for unauthorized data modification. The absence of proper exit statements after header redirects creates a logical flaw that allows code execution flow to continue past intended authentication checkpoints. This vulnerability demonstrates the critical importance of implementing proper termination points in web application security flows and highlights how simple coding oversights can lead to complete system compromise.
Mitigation strategies should focus on implementing immediate exit or die statements following all header redirect calls within administrative controller logic, ensuring that session validation occurs before any database operations are executed. Additionally, developers should implement comprehensive input validation and parameter sanitization for all administrative endpoints while establishing proper access control lists that enforce authentication requirements at every point of entry into sensitive system functions. Regular security code reviews should be implemented to identify similar patterns where authentication bypass opportunities may exist due to missing termination points in application logic flows.