CVE-2020-27615 in Loginizer
Summary
by MITRE • 10/22/2020
The Loginizer plugin before 1.6.4 for WordPress allows SQL injection (with resultant XSS), related to loginizer_login_failed and lz_valid_ip.
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Analysis
by VulDB Data Team • 11/25/2020
The vulnerability identified as CVE-2020-27615 affects the Loginizer plugin for WordPress versions prior to 1.6.4, representing a critical security flaw that combines both SQL injection and cross-site scripting capabilities. This vulnerability stems from improper input validation and sanitization within the plugin's authentication handling mechanisms, specifically targeting the loginizer_login_failed and lz_valid_ip parameters. The flaw allows attackers to manipulate database queries through malicious input, potentially leading to unauthorized access to sensitive data and execution of malicious scripts within the context of the victim's browser.
The technical exploitation of this vulnerability occurs when user input containing malicious SQL payloads is processed by the plugin without adequate sanitization. The loginizer_login_failed parameter likely handles failed login attempts and processes user-provided data that should be strictly validated. Similarly, the lz_valid_ip parameter manages IP address validation logic, where attackers can inject malicious code that gets executed within the database context. This dual nature of the vulnerability creates a particularly dangerous attack surface since successful exploitation can lead to complete database compromise followed by client-side code execution.
From an operational perspective, this vulnerability poses significant risks to WordPress installations using the affected Loginizer plugin. Attackers can leverage the SQL injection component to extract sensitive information including user credentials, database schema details, and potentially gain administrative access to the WordPress installation. The resulting XSS vulnerability further amplifies the threat by enabling attackers to execute malicious scripts in the browsers of authenticated users, potentially leading to session hijacking, data theft, or further propagation within the web application environment. The combination of these attack vectors significantly increases the potential impact compared to vulnerabilities affecting only one type of injection.
The vulnerability aligns with CWE-89 which describes SQL injection flaws, and CWE-79 which addresses cross-site scripting issues. From an adversarial perspective, this vulnerability maps to ATT&CK technique T1213.002 for Data from Information Repositories and T1566.001 for Phishing for Information, as attackers can use the compromised system to harvest credentials and user data. Organizations should immediately update to Loginizer plugin version 1.6.4 or later to remediate this vulnerability, while also implementing proper input validation measures and monitoring for suspicious login patterns that might indicate exploitation attempts. Network segmentation and web application firewalls can provide additional layers of defense against exploitation attempts targeting this specific vulnerability.