CVE-2024-51917 is a stored Cross-site Scripting (XSS) vulnerability identified in the 'Multiple Votes in one page' plugin by lequanghuylc, affecting versions up to 1.0.4. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows malicious scripts to be injected and stored persistently within the application. When other users access the affected pages, the malicious scripts execute in their browsers, potentially leading to session hijacking, theft of sensitive information, unauthorized actions on behalf of users, or distribution of malware. Stored XSS is particularly dangerous because the payload is saved on the server and served to multiple users, increasing the attack surface. The plugin is typically used in WordPress environments to enable multiple voting capabilities on a single page, which implies that many websites with interactive voting features could be vulnerable. No official patches or fixes have been linked yet, and no known exploits have been reported in the wild, but the vulnerability is publicly disclosed and could be targeted by attackers. The absence of a CVSS score requires an assessment based on the nature of the vulnerability, which is high severity due to ease of exploitation without authentication and the broad impact on confidentiality and integrity of user data. Organizations using this plugin should urgently review their installations and apply mitigations or updates once available.

The impact of CVE-2024-51917 can be significant for organizations running websites with the vulnerable plugin. Successful exploitation allows attackers to execute arbitrary JavaScript in the context of the victim’s browser, potentially leading to session hijacking, credential theft, unauthorized actions, defacement, or malware distribution. This can undermine user trust, cause data breaches, and result in reputational damage. Since the vulnerability is stored XSS, it affects all users who visit the compromised pages, amplifying the potential damage. For organizations relying on interactive voting features, this could disrupt normal operations and expose sensitive user data. Additionally, attackers could leverage this vulnerability as a foothold for further attacks within the network. The lack of authentication requirement and the ease of injecting malicious scripts increase the risk of widespread exploitation once the vulnerability becomes widely known.

To mitigate CVE-2024-51917, organizations should first check for updates or patches from the plugin vendor and apply them promptly once available. In the absence of official patches, administrators should consider disabling or removing the vulnerable plugin to eliminate the attack vector. Implement strict input validation and output encoding on all user-supplied data related to voting features to prevent malicious script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Regularly audit and sanitize stored data to detect and remove any injected malicious content. Monitor web server logs and user activity for unusual patterns indicative of exploitation attempts. Educate developers and administrators about secure coding practices, especially regarding input handling in web applications. Finally, consider deploying web application firewalls (WAFs) configured to detect and block XSS payloads targeting this plugin.