CVE-2025-5116 identifies a stored Cross-Site Scripting (XSS) vulnerability in the WP Plugin Info Card plugin for WordPress, present in all versions up to and including 5.3.1. The vulnerability stems from improper neutralization of input (CWE-79) specifically in the 'containerid' parameter, which lacks sufficient input sanitization and output escaping. This allows authenticated attackers with Contributor-level privileges or higher to inject arbitrary JavaScript code into pages generated by the plugin. When other users access these pages, the injected scripts execute in their browsers, potentially compromising session tokens, redirecting users, or performing unauthorized actions on their behalf. The vulnerability is notable because it is a regression or incomplete patch of a previous vulnerability (CVE-2025-31835), indicating that the underlying input validation issues were not fully resolved. The CVSS 3.1 score of 6.4 reflects that the attack can be performed remotely over the network with low complexity but requires some privileges (authenticated Contributor or higher). User interaction is not required for exploitation once the malicious script is injected, and the vulnerability affects confidentiality and integrity but not availability. No public exploits have been reported yet, but the presence of this vulnerability in a widely used WordPress plugin poses a significant risk to websites relying on it. The vulnerability affects all versions of the plugin up to 5.3.1, and no official patches or updates are currently linked, emphasizing the need for immediate attention by site administrators.

The impact of CVE-2025-5116 on organizations worldwide can be significant, especially for those relying on the WP Plugin Info Card plugin in their WordPress environments. Successful exploitation allows attackers with relatively low privileges (Contributor-level) to inject persistent malicious scripts that execute in the browsers of any user visiting the infected pages. This can lead to session hijacking, theft of sensitive user data, unauthorized actions performed on behalf of users, website defacement, or distribution of malware. Since WordPress powers a large portion of websites globally, including many business, government, and e-commerce sites, the vulnerability could be leveraged to compromise user trust, cause reputational damage, and potentially lead to data breaches. The requirement for authenticated access limits the attack surface somewhat, but Contributor-level access is commonly granted in collaborative environments, increasing risk. The vulnerability’s persistence (stored XSS) means that once exploited, the malicious code remains active until removed, increasing exposure duration. Additionally, the incomplete patch history suggests potential for further related vulnerabilities if the plugin’s security posture is not improved. Although no known exploits are currently in the wild, the medium CVSS score and the nature of the vulnerability warrant proactive mitigation to prevent exploitation and downstream impacts.

To mitigate CVE-2025-5116 effectively, organizations should first verify if they are using the WP Plugin Info Card plugin and identify the version installed. Since no official patch is currently linked, immediate mitigation steps include: 1) Restrict Contributor-level and higher privileges strictly to trusted users to reduce the risk of malicious script injection. 2) Implement Web Application Firewall (WAF) rules that detect and block suspicious input patterns targeting the 'containerid' parameter, especially scripts or HTML tags. 3) Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts on affected pages, reducing the impact of injected code. 4) Conduct manual code review or use security scanning tools to identify and sanitize inputs in the plugin’s codebase if custom modifications are possible. 5) Monitor website pages for unexpected script injections or changes indicative of exploitation. 6) Consider temporarily disabling or replacing the plugin with alternative solutions until a secure update is released. 7) Educate site administrators and contributors about the risks of XSS and the importance of cautious input handling. 8) Stay alert for official patches or updates from the vendor and apply them promptly once available. These targeted actions go beyond generic advice by focusing on privilege management, input filtering, and runtime protections specific to this vulnerability’s characteristics.