CVE-2024-0672 in Pz-LinkCard Plugin
Summary
by MITRE • 03/28/2024
The Pz-LinkCard WordPress plugin through 2.5.1 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin
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Analysis
by VulDB Data Team • 04/12/2025
The CVE-2024-0672 vulnerability affects the Pz-LinkCard WordPress plugin version 2.5.1 and earlier, representing a critical security flaw that enables reflected cross-site scripting attacks. This vulnerability arises from the plugin's failure to properly sanitise and escape user-supplied input parameters before incorporating them into web page output. The flaw exists within the plugin's handling of HTTP request parameters that are directly reflected back to users without adequate security controls, creating an exploitable vector for malicious actors to inject arbitrary script code into web pages viewed by unsuspecting users.
The technical implementation of this vulnerability stems from improper input validation and output encoding practices within the plugin's codebase. When the plugin processes user input through HTTP parameters, it fails to apply appropriate sanitisation measures that would prevent malicious scripts from being executed in the context of the victim's browser. This reflected XSS vulnerability specifically targets the way the plugin handles parameter data that gets echoed back to users, creating an environment where attacker-controlled content can be interpreted as executable JavaScript code. The vulnerability is particularly concerning because it can be leveraged against high-privilege users such as administrators, making it a significant threat to WordPress site security and integrity.
The operational impact of this vulnerability extends beyond simple script injection, as it can be exploited to perform various malicious activities against targeted users. Attackers can craft malicious URLs containing XSS payloads that, when clicked by administrators or other high-privilege users, would execute scripts in the context of the admin session. This could potentially lead to session hijacking, privilege escalation, data theft, or even complete compromise of the affected WordPress installation. The reflected nature of the vulnerability means that attackers do not need to store malicious code on the server; instead, they can deliver payloads through crafted URLs that are executed when the target user accesses the malicious link, making this attack vector particularly stealthy and effective.
Mitigation strategies for CVE-2024-0672 should prioritize immediate plugin updates to versions that address the sanitisation and escaping deficiencies. Organizations should also implement comprehensive input validation measures at multiple layers of their web applications, ensuring that all user-supplied data is properly sanitised before processing or output. Network-based protections such as web application firewalls can provide additional defense-in-depth measures, though these should not replace proper code-level fixes. Security practitioners should also consider implementing Content Security Policies that limit script execution capabilities and monitor for suspicious parameter usage patterns. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and maps to ATT&CK technique T1059.007 for scripting languages and T1566 for phishing attacks that leverage reflected XSS vulnerabilities to compromise user sessions and gain unauthorized access to privileged accounts.
The vulnerability demonstrates the critical importance of proper input sanitisation and output encoding practices in web application development. WordPress plugin developers must ensure that all user-supplied parameters are thoroughly validated and escaped before being incorporated into HTML output, particularly when dealing with high-privilege user contexts. This incident underscores the need for regular security audits and code reviews of third-party plugins, as well as maintaining up-to-date security practices that include proper parameter handling, input validation, and output encoding mechanisms. Organizations should also establish robust patch management processes to quickly deploy security updates for known vulnerabilities, particularly those that affect critical components such as authentication and privilege management systems.