CVE-2022-3765 in phpmyfaq
Summary
by MITRE • 10/31/2022
Cross-site Scripting (XSS) - Stored in GitHub repository thorsten/phpmyfaq prior to 3.1.8.
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Analysis
by VulDB Data Team • 11/26/2022
The vulnerability identified as CVE-2022-3765 represents a stored cross-site scripting flaw discovered in the thorsten/phpmyfaq GitHub repository prior to version 3.1.8. This type of vulnerability falls under the CWE-79 category, which specifically addresses cross-site scripting attacks where malicious scripts are injected into web applications and then executed in the context of other users' browsers. The issue manifests in a stored XSS scenario, meaning that the malicious payload is permanently saved on the server and subsequently delivered to users when they access the affected application.
The technical exploitation of this vulnerability occurs through improper input validation and output encoding mechanisms within the phpmyfaq application. Attackers can craft malicious script content that gets stored in the application's database or storage systems, and when other users view the affected pages, their browsers execute the injected scripts. This typically happens when user-supplied data is not properly sanitized before being rendered in web pages, allowing attackers to inject malicious JavaScript code through various input vectors such as comments, user profiles, or content management fields.
The operational impact of this stored XSS vulnerability is significant as it enables attackers to perform various malicious activities through compromised user sessions. An attacker could steal session cookies, redirect users to malicious websites, deface the application interface, or even execute arbitrary commands on behalf of authenticated users. This vulnerability particularly threatens web applications that handle user-generated content, as it provides a persistent attack vector that remains active until the affected software is updated. The stored nature of the vulnerability means that the malicious payload persists even after the initial injection, making it particularly dangerous for long-term exploitation.
Mitigation strategies for CVE-2022-3765 involve implementing proper input validation and output encoding practices throughout the application codebase. Organizations should ensure that all user-supplied data undergoes strict sanitization before being stored or displayed in web interfaces. The application should employ context-specific output encoding to prevent script execution in different contexts such as HTML, JavaScript, and URL contexts. Additionally, implementing a content security policy (CSP) can provide an additional layer of protection by restricting script execution and limiting the attack surface. Regular security updates and patch management are essential, as the vulnerability was resolved in version 3.1.8 of the phpmyfaq application. Security practitioners should also consider implementing web application firewalls and monitoring for suspicious input patterns to detect potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.007 for scripting and T1566.001 for spearphishing via web applications, highlighting the need for comprehensive security measures across multiple attack vectors.