CVE-2024-11329 in Payment Gateway Plugin
Summary
by MITRE • 12/07/2024
The Comfino Payment Gateway plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 4.1.1. 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 • 02/21/2025
The Comfino Payment Gateway plugin for WordPress presents a critical security vulnerability classified as reflected cross-site scripting that affects all versions up to and including 4.1.1. This vulnerability stems from improper handling of URL parameters within the plugin's codebase, specifically when utilizing the add_query_arg and remove_query_arg functions without adequate output escaping mechanisms. The flaw exists in the plugin's core functionality where user-supplied input is directly incorporated into URL generation without proper sanitization or encoding, creating an attack surface that can be exploited by malicious actors to inject malicious scripts into web pages viewed by unsuspecting users.
The technical implementation of this vulnerability occurs when the plugin processes user input through URL parameters that are then passed to the add_query_arg and remove_query_arg functions. These WordPress functions, while designed for URL manipulation, do not automatically escape output when generating query strings that are subsequently rendered in web pages. When an attacker crafts a malicious URL containing specially formatted script payloads within the query parameters, the plugin fails to properly escape these values before incorporating them into the final URL structure. The reflected nature of this vulnerability means that the malicious script is reflected back to the user through the web application's response, making it particularly dangerous as it can execute in the context of the victim's browser session without requiring any persistent storage or complex attack vectors.
The operational impact of this vulnerability is significant as it allows unauthenticated attackers to execute arbitrary web scripts in the context of a victim's browser session. This opens the door to numerous potential attack scenarios including session hijacking, credential theft, defacement of web pages, and redirection to malicious sites. The vulnerability is particularly concerning because it requires minimal user interaction to exploit, typically only needing a user to click on a maliciously crafted link. Attackers can leverage this vulnerability to steal sensitive information from authenticated users, manipulate payment processing flows, or perform actions within the plugin's administrative interface that could compromise the entire WordPress installation. The reflected nature also makes it difficult to detect and prevent through traditional security measures as the malicious payloads are not stored on the server but rather injected through the URL parameters.
Mitigation strategies for this vulnerability should focus on immediate code-level fixes within the plugin's source code. The primary solution involves implementing proper output escaping mechanisms when handling URL parameters, specifically by using WordPress's esc_url() or esc_attr() functions before incorporating values into URLs generated through add_query_arg and remove_query_arg. Security practitioners should also consider implementing Content Security Policy headers to limit script execution capabilities, though this represents a secondary defense measure. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and maps to ATT&CK technique T1566.001 for the initial access phase of an attack chain. Organizations should prioritize updating to the latest plugin version once available, implementing web application firewalls to monitor for suspicious URL patterns, and conducting thorough security assessments of all WordPress plugins to identify similar vulnerabilities that may exist in other components of the web application stack.