CVE-2025-6747 is a stored Cross-Site Scripting (XSS) vulnerability affecting the Avada (Fusion) Builder plugin for WordPress, specifically via the 'fusion_map' shortcode. This vulnerability exists in all versions up to and including 3.12.1 due to insufficient input sanitization and output escaping of user-supplied attributes. An authenticated attacker with contributor-level privileges or higher can exploit this flaw by injecting arbitrary JavaScript code into pages generated by the plugin. When any user accesses a page containing the injected script, the malicious code executes in their browser context. This can lead to session hijacking, privilege escalation, defacement, or redirection to malicious sites. The vulnerability is classified under CWE-79, which pertains to improper neutralization of input during web page generation. The CVSS v3.1 base score is 6.4 (medium severity), reflecting that the attack vector is network-based, requires low attack complexity, but does require privileges (contributor or above) and no user interaction. The scope is changed, indicating that exploitation can affect components beyond the vulnerable plugin, potentially impacting the entire WordPress site. No known exploits are currently reported in the wild, and no official patches are linked yet. This vulnerability highlights a common issue in WordPress plugin development where insufficient validation and escaping of shortcode attributes allow persistent XSS attacks, posing significant risks to site integrity and user security.

For European organizations using WordPress sites with the Avada (Fusion) Builder plugin, this vulnerability poses a significant risk to website security and user trust. Stored XSS can lead to session hijacking of site administrators or users, enabling attackers to escalate privileges or perform unauthorized actions. This can result in data leakage, defacement of public-facing websites, or distribution of malware to visitors. Given the widespread use of WordPress and the popularity of Avada as a premium theme and builder, many European businesses, including e-commerce, media, and governmental websites, could be affected. The compromise of such sites can lead to reputational damage, regulatory non-compliance (e.g., GDPR violations if personal data is exposed), and financial losses. Additionally, attackers could leverage the vulnerability to pivot into internal networks if the WordPress site is integrated with other enterprise systems. The requirement for contributor-level access reduces the risk from external anonymous attackers but raises concerns about insider threats or compromised accounts within organizations.

European organizations should immediately audit their WordPress installations to identify the presence and version of the Avada (Fusion) Builder plugin. Until an official patch is released, the following specific mitigations are recommended: 1) Restrict contributor-level and higher privileges strictly to trusted users; implement strong authentication and monitor for suspicious account activity. 2) Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious shortcode attribute payloads or unusual POST requests targeting the 'fusion_map' shortcode. 3) Use Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. 4) Regularly scan websites with security tools that detect stored XSS payloads and sanitize existing content. 5) Educate content contributors about the risks of injecting untrusted content and enforce strict content review processes. 6) Monitor official vendor channels for patch releases and apply updates promptly. 7) Consider temporarily disabling or replacing the plugin if the risk is unacceptable and no patch is available. These targeted actions go beyond generic advice by focusing on access control, detection, and containment specific to this vulnerability's exploitation vector.