CVE-2024-11459 in Country Blocker Plugin
Summary
by MITRE • 12/12/2024
The Country Blocker plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'ip' parameter in all versions up to, and including, 3.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 02/18/2025
The Country Blocker plugin for WordPress represents a critical security vulnerability through its susceptibility to reflected cross-site scripting attacks targeting the 'ip' parameter within versions up to and including 3.2. This flaw stems from inadequate input sanitization mechanisms and insufficient output escaping practices that fail to properly validate or encode user-supplied data before it is processed and returned to web browsers. The vulnerability exists at the application layer where user input flows directly into HTTP responses without proper contextual encoding, creating an environment where malicious scripts can be injected and executed within the victim's browser context.
The technical implementation of this vulnerability demonstrates a classic reflected XSS flaw that operates through the manipulation of URL parameters specifically targeting the 'ip' field. When an attacker crafts a malicious URL containing script code within the ip parameter and successfully convinces a user to click on it, the script becomes reflected back in the web page response and subsequently executed in the victim's browser. This attack vector operates without requiring authentication or privileged access, making it particularly dangerous as it can be exploited by anyone with knowledge of the vulnerable plugin's parameter structure.
The operational impact of this vulnerability extends beyond simple script injection to potentially enable more sophisticated attacks including session hijacking, credential theft, and redirection to malicious sites. Attackers can leverage this weakness to establish persistent access to user sessions, manipulate web page content, or redirect users to phishing sites designed to harvest sensitive information. The reflected nature of the attack means that successful exploitation requires social engineering to convince victims to click on crafted links, but once executed, the consequences can be severe and long-lasting.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and maps directly to ATT&CK technique T1566.002 for phishing with malicious attachments or links. The plugin's failure to implement proper input validation and output encoding represents a fundamental security oversight that violates core web application security principles. Organizations using this vulnerable plugin face significant risk of compromise as the attack surface remains accessible to any internet-connected user who can construct malicious URLs targeting the specific parameter.
Mitigation strategies for this vulnerability require immediate action including updating to the latest version of the Country Blocker plugin where the XSS flaw has been addressed through proper input sanitization and output escaping mechanisms. System administrators should also implement additional protective measures such as web application firewalls that can detect and block malicious script patterns in URL parameters, and conduct thorough security audits of all installed WordPress plugins to identify similar vulnerabilities. Regular monitoring of plugin updates and maintaining comprehensive backup procedures ensures rapid recovery capabilities while implementing proper input validation at multiple layers provides defense-in-depth against similar future vulnerabilities.