CVE-2025-14735 is a stored Cross-Site Scripting (XSS) vulnerability classified under CWE-80 affecting the nestornoe Amazon affiliate lite plugin for WordPress. This vulnerability exists in all versions up to and including 1.0.0 due to insufficient sanitization of input and lack of proper output escaping in the plugin's admin settings interface. The flaw allows authenticated users with administrator-level permissions or higher to inject arbitrary JavaScript code into pages managed by the plugin. The malicious scripts are stored persistently and execute whenever any user accesses the affected pages, potentially compromising user sessions, stealing cookies, or performing unauthorized actions on behalf of users. The vulnerability specifically impacts multisite WordPress installations or those where the unfiltered_html capability is disabled, limiting the scope but still significant in environments where multisite is common. Exploitation requires high privileges (administrator access) but no user interaction from victims, and the attack surface is limited to environments using this plugin. The CVSS v3.1 base score is 4.4, reflecting medium severity due to the need for authenticated high-level access and the limited impact on availability. No patches or known exploits are currently available, indicating the need for proactive mitigation. The vulnerability was published on December 20, 2025, and assigned by Wordfence. Given the plugin’s niche use case in affiliate marketing, the affected systems are primarily WordPress sites leveraging this plugin for Amazon affiliate integration.

For European organizations, the impact of this vulnerability can be significant in scenarios where multisite WordPress installations are used for managing multiple domains or subdomains, especially in e-commerce or affiliate marketing contexts. Successful exploitation could lead to session hijacking, unauthorized actions performed in the context of logged-in users, defacement, or redirection to malicious sites, undermining user trust and potentially causing reputational damage. Confidentiality is impacted due to possible theft of session tokens or sensitive user data. Integrity is also at risk as attackers could inject malicious content or alter displayed information. Availability impact is minimal as the vulnerability does not enable denial-of-service conditions. The requirement for administrator-level access limits the threat to insider attacks or compromised admin accounts, but given the prevalence of phishing and credential theft, this remains a realistic risk. European organizations with strict data protection regulations (e.g., GDPR) may face compliance issues if user data is compromised. The lack of patches increases the window of exposure, necessitating immediate mitigation steps.

1. Restrict administrator access strictly to trusted personnel and enforce strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of credential compromise. 2. Monitor and audit admin activities regularly to detect any unauthorized changes or suspicious behavior within the WordPress multisite environment. 3. Temporarily disable or uninstall the Amazon affiliate lite plugin if feasible until an official patch is released. 4. If the plugin must remain active, implement manual input sanitization and output escaping in the plugin’s admin settings code, or use web application firewalls (WAFs) with custom rules to detect and block malicious script injections. 5. Limit the use of multisite installations where possible or segregate critical sites to reduce attack surface. 6. Keep WordPress core and all plugins updated and subscribe to vulnerability disclosure feeds to apply patches promptly once available. 7. Educate administrators about phishing and social engineering risks to prevent credential theft. 8. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on affected sites.