CVE-2026-73992 in Query Wrangler Plugin
Summary
by MITRE • 08/20/2026
Subscriber Remote Code Execution (RCE) in Query Wrangler <= 1.5.57 versions.
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Analysis
by VulDB Data Team • 08/20/2026
The vulnerability identified as Subscriber Remote Code Execution within the Query Wrangler plugin for WordPress, affecting versions up to and including 1.5.57, represents a critical security flaw that allows authenticated attackers with subscriber-level privileges to execute arbitrary code on the target server. This specific class of vulnerability is particularly dangerous because it does not require high-privilege administrative access, thereby expanding the attack surface significantly. In many WordPress environments, even users assigned the lowest privilege level can perform actions such as creating posts or managing comments. The flaw in Query Wrangler exploits this trust model by failing to properly validate and sanitize inputs provided through its query management interface before passing them to underlying system commands or database operations that are executed with higher privileges than intended for a subscriber user.
From a technical perspective, the root cause of this vulnerability lies in improper input validation and insufficient separation of duties within the plugin's codebase. When a subscriber submits data via the Query Wrangler interface, the application processes this input without adequately checking whether the action being performed is appropriate for that specific role. This oversight allows an attacker to inject malicious payloads, typically through command injection or unsafe deserialization techniques depending on the exact implementation details of how queries are wrapped and executed. The injected code is then processed by the server-side environment, leading to remote code execution. This aligns with CWE-94, which describes Improper Control of Generation of Code (Code Injection), as well as CWE-269 regarding Improvement of Privilege, where a user gains privileges they are not entitled to in order to perform restricted actions.
The operational impact of this vulnerability is severe and multifaceted. Once an attacker achieves remote code execution via the subscriber role, they can compromise the integrity, confidentiality, and availability of the entire web application and potentially the underlying server infrastructure. Attackers may use this access to deface websites, steal sensitive data such as user credentials or personal information stored in the database, install backdoors for persistent access, or pivot into other parts of the network if the WordPress instance is part of a larger internal system. Furthermore, because the vulnerability exists at the subscriber level, it can be exploited by any registered account holder, including potentially compromised low-level accounts that are often less monitored than administrative ones. This makes detection and prevention more challenging for site administrators who may not closely monitor the activities of regular users.
In terms of threat intelligence frameworks, this vulnerability maps to MITRE ATT&CK techniques related to Initial Access via Valid Accounts and Execution through Command and Scripting Interpreter. The attacker leverages valid credentials obtained through phishing or credential stuffing attacks against low-privilege accounts to gain initial foothold. Subsequently, they utilize the application's functionality to execute system commands, facilitating further lateral movement or data exfiltration. Understanding these mappings is crucial for security teams looking to detect similar patterns in their intrusion detection systems and endpoint protection platforms by monitoring for unusual command executions originating from web server processes associated with WordPress plugins.
To mitigate this risk, immediate action is required to update the Query Wrangler plugin to version 1.5.58 or later, where these input validation checks have been corrected. If updating is not immediately feasible due to compatibility concerns, temporary mitigations should include restricting access to the affected pages for subscriber roles using server-side rules or a Web Application Firewall that can detect and block known injection patterns associated with this vulnerability. Additionally, implementing strict principle of least privilege across all user accounts ensures that even if an account is compromised, the potential damage is contained. Regular security audits and code reviews focusing on role-based access control mechanisms are essential to prevent similar vulnerabilities in custom or third-party plugins within WordPress ecosystems.