CVE-2025-3487 is a stored cross-site scripting (XSS) vulnerability identified in the Forminator Forms plugin for WordPress, which is widely used for creating contact, payment, and custom forms. The vulnerability specifically involves the 'limit' parameter, which is not properly sanitized or escaped before being rendered in web pages. This flaw allows authenticated attackers with Contributor-level privileges or higher to inject arbitrary JavaScript code into pages generated by the plugin. Since the malicious script is stored persistently, it executes every time a user visits the affected page, potentially compromising user sessions, stealing cookies, or performing actions on behalf of the user. The vulnerability does not require user interaction beyond visiting the page, and the attacker must have at least Contributor access, which is a moderately low privilege level in WordPress. The CVSS 3.1 base score is 6.4, reflecting a medium severity due to network exploitability, low attack complexity, and partial impact on confidentiality and integrity, but no impact on availability. No patches or official fixes are currently linked, and no known exploits have been reported in the wild. The vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation leading to XSS. Given the widespread use of WordPress and the popularity of the Forminator plugin, this vulnerability poses a significant risk to many websites, especially those that allow multiple contributors or editors. Attackers exploiting this vulnerability could leverage it to escalate privileges, conduct phishing, or spread malware through compromised sites.

The impact of CVE-2025-3487 is primarily on the confidentiality and integrity of affected WordPress websites and their users. Successful exploitation allows attackers to execute arbitrary JavaScript in the context of the vulnerable site, which can lead to session hijacking, theft of sensitive user data such as cookies or credentials, defacement of web pages, and unauthorized actions performed on behalf of users. Since the vulnerability requires only Contributor-level access, attackers who gain such access through credential compromise or social engineering can leverage this flaw to escalate their control and potentially pivot to higher privileges. For organizations, this can result in reputational damage, loss of customer trust, and potential regulatory penalties if user data is exposed. The vulnerability does not impact availability directly, so denial-of-service is not a primary concern. However, the persistent nature of stored XSS means that the malicious payload can affect all visitors to the compromised pages, amplifying the risk. Given the extensive use of WordPress globally and the popularity of the Forminator plugin, numerous small to medium businesses, e-commerce sites, and content platforms are at risk. Attackers could also use this vulnerability as a foothold for further attacks within the network or to distribute malware to site visitors.

To mitigate CVE-2025-3487, organizations should immediately update the Forminator Forms plugin to a patched version once available. Until an official patch is released, administrators should restrict Contributor-level access and review user roles to minimize the number of users who can inject content. Implementing a Web Application Firewall (WAF) with rules to detect and block suspicious script injections targeting the 'limit' parameter can provide temporary protection. Site owners should also enable Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Regularly audit and sanitize all user-generated content, especially form inputs, and monitor logs for unusual activities related to form submissions. Employing security plugins that scan for XSS payloads and anomalous content can help detect exploitation attempts. Additionally, educating users with Contributor access about phishing and credential security reduces the risk of account compromise. Finally, maintain regular backups of website data to enable quick recovery if an attack occurs.