CVE-2023-40627 in LivingWord Component
Summary
by MITRE • 12/14/2023
A reflected XSS vulnerability was discovered in the LivingWord component for Joomla.
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Analysis
by VulDB Data Team • 01/10/2024
The reflected cross-site scripting vulnerability in the LivingWord component for Joomla represents a critical security flaw that allows attackers to inject malicious scripts into web pages viewed by other users. This vulnerability specifically affects the Joomla content management system and stems from improper input validation and output encoding within the LivingWord component's handling of user-supplied data. The flaw enables attackers to execute arbitrary JavaScript code in the context of victims' browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of users.
The technical implementation of this vulnerability occurs when the component fails to properly sanitize or encode user input before reflecting it back in HTTP responses. When a malicious user crafts a specially formatted URL containing XSS payloads and convinces a victim to click the link, the server includes the unfiltered input directly into the web page response. This allows the injected script to execute within the victim's browser context, leveraging the trust relationship between the user and the vulnerable website. The vulnerability is classified as reflected XSS because the malicious payload is reflected off the web server rather than being stored on the server itself.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling sophisticated attack vectors such as credential harvesting through form hijacking or session manipulation. Attackers can exploit this weakness to steal user sessions, modify website content, redirect users to malicious sites, or perform actions with the privileges of authenticated users. The LivingWord component's integration within Joomla's ecosystem means that successful exploitation could compromise entire websites or lead to broader system compromises depending on the user's privileges and the scope of the installed extensions.
Security mitigations for this reflected XSS vulnerability should focus on implementing proper input validation and output encoding mechanisms throughout the component's codebase. Developers must ensure all user-supplied data is sanitized before being processed or displayed, utilizing established libraries and frameworks that provide automatic escaping for different contexts such as HTML, JavaScript, and URL encoding. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent execution of unauthorized scripts. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other components, aligning with CWE-79 which specifically addresses cross-site scripting flaws. This vulnerability also relates to ATT&CK technique T1566 which covers spearphishing with social engineering, as attackers often use such vulnerabilities to deliver malicious payloads through crafted web links that appear legitimate to end users.