CVE-2026-25434 in WP2LEADS Plugin
Summary
by MITRE • 10/06/2026
Subscriber SQL Injection in WP2LEADS <= 3.5.7 versions.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as a subscriber SQL injection flaw within the WP2LEADS plugin for WordPress, affecting versions up to and including 3.5.7, represents a critical security risk that compromises the integrity of the underlying database system. This specific weakness stems from insufficient input validation and sanitization mechanisms when processing user-supplied data related to subscriber management functions. In typical web application architectures, parameters passed via HTTP requests must be rigorously checked against expected formats before being incorporated into SQL queries. The absence of such safeguards in WP2LEADS allows an attacker to inject malicious Structured Query Language code directly into the database backend through manipulated input fields associated with subscriber profiles or registration processes.
From a technical perspective, this flaw aligns closely with CWE-89, which classifies Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. The vulnerability likely manifests when the application constructs dynamic SQL statements using unsanitized variables derived from user input without employing prepared statements or parameterized queries. This architectural deficiency enables attackers to alter the logic of database commands, potentially bypassing authentication controls, extracting sensitive data such as administrative credentials and personal subscriber information, modifying existing records, or even executing administrative operations on the database server depending on the privileges assigned to the web application's database user account.
The operational impact of this vulnerability is severe due to its potential for remote exploitation without requiring prior authentication in many configurations involving public-facing registration forms or profile update pages. Attackers can leverage automated tools like sqlmap to systematically exploit the injection point, leading to unauthorized access to confidential business intelligence stored within the WordPress database. This includes customer lists, payment details if integrated with e-commerce modules, and internal communication logs. Furthermore, successful exploitation may serve as a foothold for further attacks against the hosting environment or other applications sharing the same database instance, thereby escalating the scope of compromise beyond the immediate application layer to encompass broader organizational data assets.
In terms of threat modeling and attack classification, this vulnerability corresponds to MITRE ATT&CK technique T1190, which denotes Exploit Public-Facing Application. This categorization highlights how adversaries target internet-accessible software components that lack adequate security controls. The exploitation path typically involves identifying the vulnerable endpoint through reconnaissance or automated scanning tools followed by crafting specific payloads designed to extract data via error-based, blind boolean-based, or time-based injection techniques depending on the database engine's response behavior and configuration settings regarding verbose error reporting.
Mitigation strategies must prioritize immediate remediation of the codebase responsible for handling subscriber inputs. Developers should implement strict input validation routines that enforce expected data types and lengths while utilizing parameterized queries or stored procedures to separate SQL logic from user-supplied data entirely. Additionally, deploying a Web Application Firewall can provide an interim layer of defense by filtering out malicious payloads before they reach the application codebase until a permanent patch is applied. Organizations running affected versions should upgrade WP2LEADS to version 3.5.8 or later where these security controls have been properly implemented and tested against common injection vectors. Regular security audits and static analysis scanning are recommended to detect similar coding patterns across other plugins installed on the WordPress instance, ensuring a holistic approach to application security hygiene.