CVE-2024-9116 identifies a stored Cross-Site Scripting (XSS) vulnerability in the Monkee-Boy Essentials plugin for WordPress, present in all versions up to and including 1.1. The vulnerability stems from improper neutralization of input during web page generation, specifically through SVG file uploads. Authenticated users with Author-level access or higher can upload crafted SVG files containing malicious JavaScript payloads. Due to insufficient input sanitization and lack of output escaping, these scripts are stored and subsequently executed in the context of any user who views the SVG file on the website. This can lead to session hijacking, defacement, or redirection attacks. The CVSS v3.1 score is 6.4 (medium severity), with an attack vector of network (remote), low attack complexity, privileges required at the Author level, no user interaction needed, and a scope change indicating that the vulnerability affects components beyond the initially vulnerable plugin. The vulnerability is classified under CWE-79, which covers improper neutralization of input leading to XSS. No patches or known exploits are currently available, but the risk is significant given the widespread use of WordPress and the common practice of uploading SVG files for scalable graphics. The vulnerability requires authenticated access, which somewhat limits exposure but still poses a threat to websites with multiple authors or contributors. The stored nature of the XSS means the malicious script persists and can affect multiple users over time.

The impact of CVE-2024-9116 is primarily on the confidentiality and integrity of affected websites and their users. Successful exploitation allows attackers to execute arbitrary JavaScript in the context of the vulnerable site, potentially stealing session cookies, performing actions on behalf of users, or redirecting users to malicious domains. This can lead to account compromise, data leakage, or reputational damage for organizations. Since the vulnerability requires Author-level privileges, it is particularly dangerous in environments with multiple contributors or where account compromise is possible. The scope change in the CVSS vector indicates that the vulnerability affects components beyond the plugin itself, potentially impacting the broader WordPress site. Although availability is not directly affected, the indirect consequences such as defacement or phishing can disrupt normal operations. Organizations relying on Monkee-Boy Essentials for content management or site functionality face risks of persistent XSS attacks that can undermine user trust and site security. The lack of known exploits in the wild suggests the vulnerability is not yet widely weaponized, but proactive mitigation is critical to prevent future attacks.

To mitigate CVE-2024-9116, organizations should immediately restrict SVG file uploads to trusted users only or disable SVG uploads entirely until a patch is available. Implement strict input validation and sanitization on all uploaded SVG files, ensuring that any embedded scripts or event handlers are removed or neutralized. Employ output escaping techniques when rendering SVG content to prevent script execution. Monitor user roles and permissions carefully, limiting Author-level access to trusted personnel. Use Web Application Firewalls (WAFs) with rules designed to detect and block malicious SVG payloads or suspicious script activity. Regularly audit plugin versions and subscribe to vendor security advisories to apply patches promptly once released. Additionally, consider employing Content Security Policy (CSP) headers to restrict script execution sources, reducing the impact of potential XSS attacks. Conduct security awareness training for content contributors about the risks of uploading untrusted files. Finally, perform regular security scans and penetration tests focusing on file upload functionalities to detect similar vulnerabilities proactively.