CVE-2025-62990 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, found in Livemesh Addons for Beaver Builder, a popular WordPress plugin suite used to enhance Beaver Builder page functionalities. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing malicious scripts to be stored and later executed in the context of other users’ browsers. This can occur when user input is embedded in web pages without adequate sanitization or encoding, enabling attackers to inject JavaScript payloads that execute when other users view the affected pages. The vulnerability affects all versions up to 3.9.2, with no specific version exclusions noted. The CVSS v3.1 base score is 6.5, indicating medium severity, with the vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L. This means the attack can be performed remotely over the network, requires low attack complexity, low privileges (authenticated user), and user interaction (victim must trigger the malicious payload). The scope is changed, indicating that exploitation can affect resources beyond the vulnerable component. The impact includes partial loss of confidentiality, integrity, and availability, such as theft of session cookies, defacement, or injection of malicious content leading to further compromise. No patches are currently linked, and no known exploits are reported in the wild, suggesting the vulnerability is newly disclosed or not yet actively exploited. The plugin’s integration in WordPress sites makes it a potential vector for attackers targeting websites that use Beaver Builder with Livemesh Addons, common in business and content-heavy sites.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on WordPress with Livemesh Addons for Beaver Builder to manage their web presence. Exploitation could lead to unauthorized access to user sessions, defacement of websites, or distribution of malware to site visitors, damaging brand reputation and customer trust. Confidential data leakage through session hijacking or theft of authentication tokens could facilitate further attacks within corporate networks. The partial integrity and availability impacts could disrupt business operations, particularly for e-commerce or service portals. Given the medium severity and requirement for authenticated access, insider threats or compromised user accounts could be leveraged to exploit this vulnerability. Organizations in sectors such as finance, healthcare, and government, which often use WordPress for public-facing sites, may face regulatory and compliance risks under GDPR if personal data is exposed. The lack of known exploits currently provides a window for proactive mitigation before widespread attacks occur.

1. Monitor Livemesh and Beaver Builder official channels for security updates and apply patches immediately once released. 2. Restrict plugin usage to trusted users only, minimizing the number of accounts with permissions to input content that is rendered on web pages. 3. Implement strong Content Security Policies (CSP) to limit the execution of unauthorized scripts in browsers. 4. Employ Web Application Firewalls (WAF) with custom rules to detect and block suspicious input patterns indicative of XSS attempts. 5. Conduct regular security audits and code reviews of custom content or extensions interacting with the plugin. 6. Sanitize and encode all user inputs rigorously, especially those that are stored and rendered on pages. 7. Educate site administrators and content creators about the risks of XSS and safe content practices. 8. Use security plugins that can detect and alert on XSS payloads or anomalous behavior. 9. Monitor web server and application logs for unusual activities or repeated input patterns. 10. Consider isolating critical web applications or using sandboxing techniques to limit the impact of potential exploitation.