CVE-2026-74007 in 3D FlipBook Plugin
Summary
by MITRE • 08/18/2026
Unauthenticated Sensitive Data Exposure in 3D FlipBook – PDF Flipbook Viewer, Flipbook Image Gallery <= 1.16.20 versions.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/18/2026
The vulnerability identified within the 3D FlipBook plugin for WordPress, specifically affecting versions up to and including 1.16.20, represents a critical failure in access control mechanisms that leads to unauthenticated sensitive data exposure. This security flaw stems from an improper implementation of authentication checks on specific endpoints or API routes exposed by the plugin. In a properly secured web application, any request intended to retrieve or manipulate sensitive resources must be validated against user permissions and session states before processing. However, in this instance, the software fails to verify whether the requesting entity possesses valid administrative credentials or an active authenticated session when accessing certain data retrieval functions. This oversight allows any remote actor with network connectivity to the target WordPress installation to interact directly with these unprotected endpoints without needing to log in first.
From a technical perspective, the root cause lies in the lack of proper input validation and authorization checks within the PHP code handling flipbook metadata or viewer configurations. The plugin likely exposes internal data structures such as database query results, configuration settings, or user-specific content through public-facing URLs that do not enforce role-based access control. When an attacker constructs a specific HTTP request targeting these endpoints, the server processes it and returns sensitive information directly in the response body. This behavior aligns with CWE-200, which classifies Information Exposure as a vulnerability where software inadvertently reveals security-relevant information to unauthorized actors. The absence of authentication checks means that this exposure is not limited by user privilege levels, effectively bypassing one of the fundamental pillars of web application security: identity and access management.
The operational impact of this vulnerability can be severe depending on the nature of the exposed data. Attackers may extract sensitive configuration details such as database connection strings, API keys, or internal file paths that could facilitate further attacks like Local File Inclusion or Remote Code Execution. Additionally, if user-specific flipbook content is accessible without authentication, it could lead to a breach of confidentiality for private documents or media hosted on the platform. This type of data leakage not only compromises the integrity and privacy of the website owners but also erodes trust among end-users who expect their uploaded materials to remain secure behind proper access controls. In enterprise environments, such exposure can violate compliance requirements related to data protection regulations like GDPR or HIPAA if personal identifiable information is inadvertently disclosed through these unauthenticated channels.
To mitigate this risk, immediate action must be taken by updating the 3D FlipBook plugin to a version newer than 1.16.20 where the developers have presumably patched the access control logic. If an update is not immediately available or feasible due to compatibility constraints, administrators should implement compensating controls at the web server level. This can include configuring Web Application Firewall rules to block requests targeting known vulnerable endpoints or restricting direct access to plugin directories via .htaccess files for Apache servers or equivalent configurations for Nginx and IIS. Furthermore, it is advisable to audit other installed plugins for similar patterns of unauthenticated data exposure by reviewing code for missing nonce verification functions or improper use of WordPress capability checks such as current_user_can. Regular security audits and penetration testing should be integrated into the development lifecycle to ensure that access control mechanisms are robust against unauthorized access attempts.
This vulnerability also maps to specific tactics in the MITRE ATT&CK framework, particularly those related to Collection and Exfiltration phases where attackers gather data from local system resources before exfiltrating it. By exploiting this flaw, an adversary can perform reconnaissance more efficiently without triggering alerts associated with failed login attempts or brute force attacks. The lack of authentication requirement makes this a low-effort attack vector that is easily automated by script kiddies and advanced persistent threats alike. Therefore, treating this issue as high severity is warranted due to its ease of exploitation and the potential for significant data compromise. Organizations relying on WordPress ecosystems must prioritize patch management processes to ensure that such known vulnerabilities are addressed promptly before they can be leveraged in broader attack campaigns targeting web infrastructure integrity.