CVE-2025-6255 is a medium-severity Stored Cross-Site Scripting (XSS) vulnerability affecting the Dynamic AJAX Product Filters plugin for WooCommerce, developed by plugincy. This vulnerability exists in all versions up to and including 1.3.7. The root cause is insufficient sanitization and escaping of the 'className' parameter, which is used during web page generation. Authenticated users with Contributor-level access or higher can exploit this flaw by injecting arbitrary JavaScript code into pages that utilize the vulnerable plugin. When other users access these pages, the injected scripts execute in their browsers, potentially leading to session hijacking, privilege escalation, or other malicious activities. The vulnerability has a CVSS 3.1 base score of 6.4, reflecting its medium severity, with an attack vector of network, low attack complexity, and requiring privileges (Contributor or above) but no user interaction. The scope is changed, indicating that the vulnerability can affect resources beyond the initially vulnerable component. No known exploits are currently reported in the wild, and no official patches have been linked yet. The vulnerability falls under CWE-79, which concerns improper neutralization of input during web page generation, a common cause of XSS issues. This vulnerability is particularly relevant for WordPress sites using WooCommerce with this plugin installed, as it directly impacts the integrity and confidentiality of user sessions and data through script injection.

For European organizations, especially e-commerce businesses using WooCommerce with the Dynamic AJAX Product Filters plugin, this vulnerability poses a significant risk. Exploitation could lead to unauthorized script execution in users' browsers, enabling theft of authentication cookies, defacement, or redirection to malicious sites. This can damage brand reputation, lead to data breaches involving customer information, and cause regulatory non-compliance under GDPR due to compromised personal data. The requirement for Contributor-level access limits exploitation to insiders or compromised accounts, but many organizations grant such privileges to multiple users, increasing risk. The vulnerability affects the integrity of the web application and confidentiality of user data, though it does not directly impact availability. Given the widespread use of WooCommerce in Europe, the potential for targeted attacks against online retailers is notable, especially during high-traffic periods. The absence of known exploits suggests a window for proactive mitigation before widespread abuse occurs.

Organizations should immediately audit their WordPress installations to identify the presence of the Dynamic AJAX Product Filters plugin and verify its version. Until an official patch is released, restrict Contributor-level access strictly to trusted users and review user roles to minimize privilege exposure. Implement Web Application Firewall (WAF) rules to detect and block suspicious payloads targeting the 'className' parameter. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts. Regularly monitor logs for unusual activity related to plugin usage. Additionally, consider disabling or removing the plugin if it is not essential. Once a patch becomes available, prioritize prompt updating of the plugin to the fixed version. Educate administrators and content contributors about the risks of injecting untrusted input and enforce secure coding practices for any customizations involving this plugin.