CVE-2026-15727 in WP Bulk Delete Plugin
Summary
by MITRE • 07/16/2026
The WP Bulk Delete plugin for WordPress is vulnerable to generic SQL Injection via the 'delete_user_roles' parameter in all versions up to, and including, 1.4.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. wp_unslash() is applied to the raw POST body before parse_str() decomposes it, stripping WordPress magic-quotes protection and leaving attacker-controlled values fully unescaped prior to reaching the SQL sink.
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Analysis
by VulDB Data Team • 07/16/2026
The vulnerability in the WP Bulk Delete plugin represents a critical sql injection flaw that exploits improper input handling within wordpress administrative interfaces. This weakness exists in versions up to and including 142 where the plugin fails to adequately sanitize user-provided data before incorporating it into database queries. The specific parameter 'delete_user_roles' serves as the attack vector, allowing malicious actors to manipulate existing sql statements through crafted input that bypasses standard security measures. The vulnerability is particularly dangerous because it requires only administrator-level access or higher, making it accessible to attackers who have already compromised administrative credentials within wordpress environments.
The technical implementation of this flaw stems from improper parameter handling within the plugin's processing logic. When user input reaches the plugin's backend processing functions, wp_unslash() is applied to the raw post body before parse_str() decomposes the data structure. This sequence effectively strips away wordpress's built-in magic quotes protection mechanisms that normally safeguard against sql injection attacks by escaping special characters in user-supplied data. The result is that attacker-controlled values flow directly into sql queries without proper sanitization, creating a direct path for malicious sql commands to be executed within the database context. This bypass of standard protection mechanisms aligns with common cwes related to insufficient input validation and improper neutralization of special elements used in sql commands.
The operational impact of this vulnerability extends beyond simple data exfiltration to encompass potential system compromise and unauthorized access to sensitive information. Attackers with administrator privileges can leverage this flaw to extract database contents including user credentials, configuration details, and other sensitive data stored within the wordpress installation. The vulnerability's exploitation allows for complex sql injection payloads that could potentially enable privilege escalation or complete database compromise. Given that many wordpress installations store critical business data within their databases, this vulnerability presents a significant risk to organizations relying on these platforms for their digital infrastructure.
Mitigation strategies for this vulnerability require immediate remediation through plugin updates to versions that properly implement input sanitization and parameterized queries. Organizations should ensure all instances of wp bulk delete are updated to versions that address the sql injection flaw by implementing proper escaping mechanisms before database operations. System administrators should also consider implementing additional monitoring for unusual administrative activities and database access patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of defensive programming practices including parameterized queries, input validation, and avoiding direct concatenation of user-supplied data into sql commands, which are fundamental principles outlined in various cybersecurity frameworks and attack mitigation strategies.