CVE-2012-4283 in Login With Ajax
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Login With Ajax plugin before 3.0.4.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via the callback parameter.
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Analysis
by VulDB Data Team • 12/07/2021
The CVE-2012-4283 vulnerability represents a critical cross-site scripting flaw within the Login With Ajax WordPress plugin, specifically affecting versions prior to 3.0.4.1. This vulnerability resides in the plugin's handling of the callback parameter, creating a pathway for remote attackers to execute malicious web scripts or HTML code within the context of authenticated user sessions. The issue stems from insufficient input validation and output sanitization mechanisms within the plugin's authentication flow, which processes user callbacks without proper security controls. The vulnerability operates at the application layer and directly impacts the WordPress content management system's security posture, potentially allowing attackers to exploit the weakness in conjunction with other authentication-related vulnerabilities.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious callback parameter containing embedded script code that gets executed in the victim's browser when the plugin processes the authentication request. This flaw falls under the CWE-79 category of Cross-Site Scripting, specifically representing a reflected XSS attack vector where malicious input is immediately reflected back to the user without proper sanitization. The vulnerability demonstrates a classic lack of input validation practices and insufficient output encoding, which are fundamental security controls recommended by the OWASP Top Ten project and the MITRE ATT&CK framework under the execution and persistence tactics. Attackers can leverage this weakness to steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users.
The operational impact of CVE-2012-4283 extends beyond simple script injection, as it can enable attackers to establish persistent access to WordPress installations and potentially compromise entire user bases. When exploited successfully, the vulnerability allows attackers to execute arbitrary code within the context of the victim's browser, potentially leading to session hijacking, credential theft, or data manipulation. The vulnerability affects WordPress sites using the Login With Ajax plugin, which is commonly deployed for enhanced user authentication experiences, making it a particularly attractive target for attackers seeking to compromise user sessions. The reflected nature of the XSS attack means that the malicious payload is immediately executed upon user interaction with the compromised callback parameter, creating a direct pathway for exploitation without requiring additional attack vectors.
Mitigation strategies for CVE-2012-4283 primarily focus on immediate plugin updates to version 3.0.4.1 or later, which contain proper input validation and output sanitization mechanisms. Security administrators should implement comprehensive input validation controls, including parameter sanitization and strict output encoding, to prevent malicious script injection. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to mitigate the impact of successful XSS exploitation attempts. Organizations should also consider implementing web application firewalls to detect and block suspicious callback parameter values, while maintaining regular security audits of third-party WordPress plugins to identify similar vulnerabilities. The ATT&CK framework recommends implementing proper input validation controls and output encoding as core defensive measures against XSS attacks, aligning with industry standards established by NIST and ISO/IEC 27001 for secure software development practices.