CVE-2025-26774 identifies a reflected Cross-site Scripting (XSS) vulnerability in the Rock Solid Responsive Modal Builder for High Conversion – Easy Popups plugin, versions up to 1.5.0. The root cause is improper neutralization of user-supplied input during the generation of web pages, which allows attackers to inject malicious JavaScript code that is reflected back to users without adequate sanitization. This vulnerability can be exploited by crafting malicious URLs or input fields that, when accessed by a victim, execute arbitrary scripts in their browser context. Such scripts can steal session cookies, perform unauthorized actions, or redirect users to malicious sites. The vulnerability does not require authentication, increasing its risk profile, and does not currently have known exploits in the wild. The plugin is commonly used in WordPress environments to create modal popups aimed at improving conversion rates, making it a target for attackers seeking to compromise websites with high user engagement. The absence of a CVSS score indicates the need for an expert severity assessment, which here is considered high due to the potential impact and ease of exploitation. No official patches or mitigations are currently linked, emphasizing the need for immediate attention once updates are released.

The impact of CVE-2025-26774 can be significant for organizations using the affected plugin. Successful exploitation allows attackers to execute arbitrary scripts in users' browsers, potentially leading to session hijacking, theft of sensitive information such as credentials or personal data, and unauthorized actions performed on behalf of users. This can undermine user trust, lead to data breaches, and cause reputational damage. For e-commerce or high-traffic websites relying on the plugin for conversion optimization, the vulnerability could also facilitate phishing attacks or malware distribution. The reflected nature of the XSS means attackers must lure victims to maliciously crafted URLs, but no authentication is required, broadening the attack surface. The lack of known exploits in the wild suggests the vulnerability is newly disclosed, but the risk remains high due to the common use of the plugin and the critical nature of XSS vulnerabilities in web applications.

Organizations should immediately monitor for updates from the vendor Rock Solid and apply patches as soon as they become available. In the interim, implement strict input validation and output encoding on all user-supplied data to prevent script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. Web application firewalls (WAFs) can be configured to detect and block common XSS attack patterns targeting this plugin. Additionally, review and limit the use of the plugin if possible, especially on pages with sensitive user interactions. Educate users and administrators about the risks of clicking untrusted links and encourage the use of security tools such as browser extensions that block malicious scripts. Regular security audits and penetration testing focused on input handling can help identify similar vulnerabilities proactively.