CVE-2025-4102 is a vulnerability classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) affecting the Beaver Builder Plugin (Starter Version) for WordPress. The vulnerability arises from insufficient validation of file types in the 'save_enabled_icons' function, which handles icon uploads. Because the plugin fails to restrict the types of files that can be uploaded, an authenticated user with administrator privileges can upload arbitrary files, including potentially malicious scripts. This can lead to remote code execution (RCE) if the uploaded file is executed by the server, allowing attackers to take full control of the affected WordPress site and underlying server. The vulnerability affects all versions up to and including 2.9.1, with only a partial fix applied in version 2.9.1, indicating that the issue may still be exploitable or incompletely mitigated. The CVSS v3.1 base score is 7.2, reflecting high severity due to network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. The attack requires administrator-level privileges, which limits the attack surface to users who already have elevated access, but no further user interaction is needed. No public exploits have been reported yet, but the potential for exploitation remains significant given the widespread use of WordPress and Beaver Builder. The vulnerability was published on June 20, 2025, and was assigned by Wordfence. The lack of a complete patch and the critical nature of the vulnerability necessitate immediate attention from site administrators.

The impact of CVE-2025-4102 is substantial for organizations using the Beaver Builder Plugin (Starter Version) on WordPress sites. Successful exploitation allows attackers with administrator access to upload arbitrary files, potentially leading to remote code execution. This can result in full compromise of the website and underlying server, including data theft, defacement, malware deployment, or pivoting to internal networks. The confidentiality, integrity, and availability of the affected systems can be severely impacted. Since WordPress powers a significant portion of the web, including many business and government sites, the scope of potential damage is broad. Organizations relying on Beaver Builder for site design and content management face risks of service disruption, reputational damage, and regulatory consequences if sensitive data is exposed. The requirement for administrator privileges reduces the risk from external attackers but raises concerns about insider threats or compromised admin accounts. The partial patch in version 2.9.1 suggests that some risk remains even after updating, emphasizing the need for additional controls and monitoring.

1. Immediately update the Beaver Builder Plugin (Starter Version) to the latest version once a complete patch is released; monitor vendor advisories for updates beyond 2.9.1. 2. Until a full patch is available, restrict administrator access strictly to trusted personnel and enforce strong authentication mechanisms such as multi-factor authentication (MFA). 3. Implement web application firewalls (WAFs) with rules to detect and block suspicious file uploads or execution attempts related to the plugin's upload functionality. 4. Conduct regular audits of uploaded files and server directories to detect unauthorized or suspicious files. 5. Harden the server environment by disabling execution permissions in directories used for file uploads where possible. 6. Monitor logs for unusual administrator activity or file upload attempts. 7. Consider temporarily disabling the 'save_enabled_icons' feature or the Beaver Builder Plugin if feasible until a secure patch is confirmed. 8. Educate administrators on the risks of arbitrary file uploads and the importance of secure plugin management. 9. Employ intrusion detection/prevention systems (IDS/IPS) to detect exploitation attempts. 10. Maintain regular backups and incident response plans to recover quickly from potential compromises.