CVE-2025-8617 is a stored cross-site scripting vulnerability identified in the YITH WooCommerce Quick View plugin for WordPress, impacting all versions up to and including 2.7.0. The vulnerability arises from improper neutralization of user-supplied input within the plugin's yith_quick_view shortcode, where insufficient sanitization and output escaping allow malicious scripts to be stored and executed in the context of any user accessing the affected pages. Exploitation requires an attacker to have at least contributor-level authenticated access, enabling them to inject arbitrary JavaScript code that executes whenever a page containing the injected shortcode is viewed. This can lead to a range of attacks including session hijacking, unauthorized actions on behalf of users, and potential privilege escalation. The vulnerability has a CVSS 3.1 base score of 6.4, indicating medium severity, with an attack vector over the network, low attack complexity, requiring privileges, no user interaction, and scope change due to impact on other components. No public exploits have been reported yet, but the vulnerability's presence in a widely used e-commerce plugin makes it a significant risk. The lack of a patch at the time of reporting necessitates interim mitigations such as restricting contributor permissions, disabling the shortcode, or applying custom input validation and output encoding to prevent script injection.

For European organizations, particularly those operating e-commerce platforms using WooCommerce with the YITH Quick View plugin, this vulnerability poses a risk of client-side script injection leading to session hijacking, theft of sensitive customer data, unauthorized actions, and reputational damage. The stored nature of the XSS means that once injected, the malicious script affects all users accessing the compromised pages, potentially impacting a large user base. This can result in loss of customer trust, regulatory non-compliance especially under GDPR due to data exposure, and financial losses from fraud or downtime. Organizations with contributor-level users who manage content are particularly vulnerable, as these accounts can be leveraged to inject malicious code. The medium severity score reflects the need for authentication but highlights the ease of exploitation within the trusted user base. The impact on availability is minimal, but confidentiality and integrity of user sessions and data are at risk.

European organizations should prioritize updating the YITH WooCommerce Quick View plugin to a patched version once released by the vendor. Until a patch is available, restrict contributor-level permissions to trusted users only and consider temporarily disabling the yith_quick_view shortcode functionality to prevent exploitation. Implement custom input validation and output encoding on all user-supplied attributes related to the shortcode to neutralize malicious scripts. Employ Web Application Firewalls (WAFs) with rules targeting common XSS payloads specific to this plugin. Conduct regular security audits and monitoring of user-generated content for suspicious scripts. Educate content contributors about safe input practices and monitor logs for unusual activities. Additionally, enforce Content Security Policy (CSP) headers to limit script execution sources and reduce the impact of any injected scripts. Finally, maintain up-to-date backups to enable rapid recovery if an attack occurs.