CVE-2025-8562 in Custom Query Shortcode Plugin
Summary
by MITRE • 08/25/2025
The Custom Query Shortcode plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 0.4.0 via the 'lens' parameter. This makes it possible for authenticated attackers, with Contributor-level access and above, to read the contents of files on the server, which can contain sensitive information.
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Analysis
by VulDB Data Team • 08/25/2025
The Custom Query Shortcode plugin for WordPress presents a critical path traversal vulnerability identified as CVE-2025-8562 affecting all versions up to and including 0.4.0. This vulnerability stems from inadequate input validation within the plugin's handling of the 'lens' parameter, which allows malicious actors to manipulate file paths and access arbitrary files on the web server. The flaw specifically targets authenticated users who possess Contributor-level privileges or higher, making it particularly concerning as it can be exploited by users who already have significant access rights within the WordPress environment. The vulnerability falls under CWE-22 Path Traversal and aligns with ATT&CK technique T1083 File and Directory Discovery, representing a serious security risk that can lead to information disclosure and potential further exploitation.
The technical implementation of this vulnerability occurs when the plugin processes the 'lens' parameter without proper sanitization or validation of file path inputs. Attackers can construct malicious paths that traverse the file system upward using directory traversal sequences such as '../' or similar techniques to access files outside the intended directory scope. This allows authenticated users to read sensitive files including configuration files, database credentials, wp-config.php, plugin files, and potentially other system files that contain confidential information. The vulnerability exists because the plugin does not properly validate or sanitize user-supplied input before using it in file system operations, creating an opportunity for attackers to escalate their privileges and gain access to information that should remain protected within the WordPress installation.
The operational impact of CVE-2025-8562 extends beyond simple information disclosure, as the ability to read arbitrary files can lead to comprehensive system reconnaissance and further exploitation opportunities. An attacker with Contributor-level access can potentially discover database connection strings, API keys, and other sensitive configuration data that could be used to compromise the entire WordPress installation or related systems. This vulnerability can also facilitate privilege escalation attacks, as the leaked information might reveal credentials or system configurations that enable attackers to move laterally within the network. The attack surface is particularly dangerous because it requires only Contributor-level privileges, which are often granted to content authors, editors, and other trusted users within WordPress environments, making the vulnerability exploitable by individuals who should normally be restricted from accessing sensitive system information.
Organizations should immediately implement mitigations including updating to the latest version of the Custom Query Shortcode plugin where available, or applying custom patches that properly sanitize the 'lens' parameter input. The recommended approach involves implementing strict input validation that rejects any path traversal sequences and ensures that file operations occur only within designated directories. Security teams should also consider implementing network-based protections such as web application firewalls that can detect and block suspicious path traversal attempts. Additionally, privilege management should be reviewed to ensure that users with Contributor-level access do not have unnecessary access to sensitive system files, and regular security audits should be conducted to identify and remediate similar vulnerabilities across the WordPress ecosystem. This vulnerability demonstrates the importance of proper input validation and the principle of least privilege in securing web applications against path traversal attacks that can compromise entire systems through seemingly minor implementation flaws.