CVE-2022-4407 in phpmyfaq
Summary
by MITRE • 12/11/2022
Cross-site Scripting (XSS) - Reflected in GitHub repository thorsten/phpmyfaq prior to 3.1.9.
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Analysis
by VulDB Data Team • 02/16/2026
The vulnerability identified as CVE-2022-4407 represents a reflected cross-site scripting flaw within the thorsten/phpmyfaq GitHub repository affecting versions prior to 3.1.9. This security weakness resides in the application's handling of user input within HTTP response headers, specifically in the way the software processes and outputs parameters without proper sanitization or encoding mechanisms. The vulnerability manifests when malicious actors craft specially crafted URLs containing script payloads that get executed in the victim's browser context upon page load. This type of vulnerability falls under the Common Weakness Enumeration category CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications. The issue occurs because the application fails to properly escape or validate input parameters before incorporating them into dynamic HTML content, creating an avenue for attackers to inject malicious scripts that can execute in the context of other users' sessions.
The operational impact of this reflected XSS vulnerability extends beyond simple data theft or session hijacking. Attackers can leverage this weakness to execute arbitrary JavaScript code within the victim's browser, potentially leading to full account compromise, data exfiltration, or the redirection of users to malicious websites. In the context of phpmyfaq, which serves as a knowledge base management system, successful exploitation could allow attackers to access sensitive documentation, manipulate content, or gain unauthorized administrative privileges. The reflected nature of this vulnerability means that the malicious payload must be delivered through a crafted URL that the victim must click on, making it a client-side attack vector that relies on social engineering tactics. This characteristic aligns with ATT&CK technique T1566 which describes the use of spearphishing and other social engineering methods to deliver malicious payloads.
The technical exploitation of CVE-2022-4407 requires attackers to identify specific input parameters within the phpmyfaq application that are directly reflected in HTTP responses without proper sanitization. These parameters typically include URL query strings, form inputs, or other user-controllable data elements that get embedded into the page output. The vulnerability's remediation involves implementing proper input validation and output encoding mechanisms throughout the application's codebase, particularly in areas where user-supplied data is processed and rendered. Organizations should ensure that all user input is properly escaped before being incorporated into HTML contexts, and that the application employs Content Security Policy headers to mitigate the impact of potential script injection attempts. The fix requires updating to version 3.1.9 or later, which includes the necessary patches to sanitize input parameters and prevent the reflection of malicious scripts back to users. Security teams should also implement automated scanning tools to identify similar vulnerabilities in other applications and establish secure coding practices that prevent XSS flaws from occurring in future development cycles.