CVE-2026-115212 in MView 豆瓣电影 Plugin
Summary
by MITRE • 11/09/2026
The mView 豆瓣电影 WordPress plugin through 1.0.3 does not validate the type, name, or source of a remotely fetched file, nor perform any capability or authorization check, before saving it to a web-accessible directory, allowing any authenticated user such as a subscriber to upload arbitrary PHP files and achieve remote code execution.
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Analysis
by VulDB Data Team • 11/09/2026
The vulnerability identified in the mView Douban Movie WordPress plugin versions through 1.0.3 represents a critical security flaw rooted in improper input validation and insufficient access control mechanisms. This specific weakness allows authenticated users, including those with the lowest privilege level such as subscribers, to upload arbitrary files directly to web-accessible directories on the server. The core technical failure lies in the application's handling of remotely fetched files, where it fails to validate essential attributes such as file type, name, or source before persisting them to disk. By neglecting these validation steps and bypassing standard capability checks, the plugin effectively creates an unrestricted file upload vector that can be exploited by any logged-in user regardless of their intended role within the WordPress ecosystem.
From a technical perspective, this flaw is classified under CWE-434, which describes the Unrestricted Upload of File with Dangerous Type. The absence of strict MIME type checking or extension whitelisting means that malicious actors are not restricted to uploading benign assets like images or documents. Instead, they can craft requests containing PHP scripts disguised as other file types or uploaded without proper sanitization of their filenames. When these files are saved into a directory that is accessible via the web server's document root, the environment becomes capable of interpreting and executing the embedded code. This transforms a simple storage operation into a severe execution vector, fundamentally compromising the integrity of the underlying system.
The operational impact of this vulnerability is profound, as it directly leads to Remote Code Execution (RCE). Once an attacker successfully uploads a PHP shell or similar malicious script, they can interact with it through their web browser to execute arbitrary commands on the server hosting the WordPress instance. This level of access allows for complete compromise of the website's data and infrastructure. Attackers may use this foothold to deface the site, steal sensitive user information such as credentials and personal data, install further malware or backdoors for persistent access, or pivot into other systems within the internal network if the server is part of a larger architecture. The ease of exploitation by low-privileged users significantly lowers the barrier to entry for attackers, increasing the likelihood of successful compromise even against sites with basic security hygiene.
This vulnerability aligns closely with MITRE ATT&CK techniques related to Initial Access and Execution. Specifically, it maps to T1505.003, Server Software Component: Web Shell, where an attacker establishes a persistent backdoor through uploaded scripts. It also relates to T1078, Valid Accounts, as the exploitation relies on valid authentication credentials, albeit with minimal privileges. The lack of authorization checks further highlights deficiencies in access control logic, which can be correlated with CWE-269, Improper Privilege Management. These classifications underscore that the issue is not merely a coding error but a systemic failure to enforce security boundaries between different user roles and file system operations.
To mitigate this vulnerability, immediate action is required by updating the mView Douban Movie plugin to version 1.0.4 or later, where these validation checks have presumably been implemented. In environments where an update cannot be applied immediately, administrators should implement strict server-side controls such as disabling PHP execution in upload directories using web server configuration directives like Apache's php_admin_flag or Nginx location blocks that deny access to executable scripts within media folders. Additionally, enforcing rigorous input validation on the application level is essential; this includes validating file extensions against a whitelist of allowed types, checking MIME types rather than relying solely on client-supplied data, and ensuring that all file operations are preceded by robust capability checks verifying that the user has explicit permission for such actions. Regular security audits and penetration testing can help identify similar weaknesses in other plugins or custom code within the WordPress installation to prevent future incidents of this nature.