CVE-2024-49263 in My Favorites Plugin
Summary
by MITRE • 10/17/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Takashi Matsuyama My Favorites my-favorites allows Stored XSS.This issue affects My Favorites: from n/a through <= 1.4.1.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 04/06/2026
The vulnerability CVE-2024-49263 represents a critical cross-site scripting flaw in the My Favorites plugin developed by Takashi Matsuyama. This stored XSS vulnerability occurs during web page generation when user input is improperly sanitized, allowing malicious scripts to be permanently stored and executed in the context of other users' browsers. The vulnerability exists within the plugin's handling of user-submitted data that gets rendered into web pages without adequate input validation or output encoding mechanisms. The affected version range indicates that all versions up to and including 1.4.1 are susceptible to this attack vector, making it a widespread concern for WordPress users who have installed this particular plugin.
The technical exploitation of this vulnerability follows the standard stored XSS attack pattern where an attacker crafts malicious input containing script code that gets stored in the application's database or storage mechanism. When other users view pages that display this stored content, the malicious script executes in their browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability maps directly to CWE-79 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly encode or escape user input before incorporating it into dynamically generated web content. This weakness creates a persistent threat where malicious code remains embedded in the application until manually removed.
From an operational perspective, this vulnerability poses significant risks to WordPress installations using the My Favorites plugin, as it allows attackers to compromise user sessions and potentially gain unauthorized access to administrative functions. The stored nature of the vulnerability means that the malicious payload persists even after the initial injection, making it particularly dangerous as it can affect multiple users over extended periods. Attackers could leverage this vulnerability to execute arbitrary code, steal cookies, perform unauthorized actions on behalf of victims, or redirect users to phishing sites. The impact extends beyond individual user compromise to potential full site takeover if administrators are among the affected users, as the stored XSS could be used to steal admin credentials or manipulate plugin functionality.
Security mitigations for CVE-2024-49263 should prioritize immediate plugin updates to versions that address the XSS vulnerability through proper input sanitization and output encoding. Administrators should implement comprehensive input validation that filters or escapes potentially malicious content before storage, while also ensuring that all user-generated content is properly encoded when rendered in web pages. The implementation of Content Security Policy headers can provide additional defense-in-depth measures by restricting script execution and reducing the impact of successful XSS attempts. Regular security audits of installed plugins and themes should be conducted to identify similar vulnerabilities, with particular attention to input handling mechanisms that process user data. Organizations should also establish incident response procedures for detecting and remediating stored XSS vulnerabilities, as these threats can remain dormant for extended periods and may be difficult to detect through routine monitoring. The vulnerability aligns with ATT&CK technique T1531 - Account Access Removal and T1059.007 - Command and Scripting Interpreter, as it enables attackers to execute malicious code in user contexts and potentially gain persistent access through session hijacking.