CVE-2025-15266 is a Stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79, found in the GeekyBot — Generate AI Content Without Prompt, Chatbot and Lead Generation plugin for WordPress. This vulnerability exists in all versions up to and including 1.1.7 due to improper input sanitization and output escaping of the chat message field. An unauthenticated attacker can submit malicious JavaScript payloads via the chat interface, which are then stored and rendered in the Chat History page viewed by administrators. When an administrator accesses this page, the injected script executes in their browser context, potentially allowing the attacker to steal session cookies, perform actions on behalf of the admin, or pivot to further compromise the system. The vulnerability has a CVSS 3.1 base score of 7.2, indicating high severity, with an attack vector of network (remote), low attack complexity, no privileges required, and no user interaction needed. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable plugin. Although no public exploits are currently known, the ease of exploitation and the potential impact on administrative control make this a significant threat. The vulnerability highlights the importance of secure coding practices, especially proper input validation and output encoding in web applications that handle user-generated content. Since the plugin is used for AI content generation and lead management, it is likely deployed in marketing and customer engagement environments, increasing the attractiveness of targets for attackers.

For European organizations, this vulnerability poses a risk of administrative account compromise on WordPress sites using the GeekyBot plugin. Successful exploitation can lead to unauthorized access to sensitive data, manipulation of chatbot content, and potential lateral movement within the network. The confidentiality of administrator credentials and session tokens is at risk, which can undermine the integrity of the website and associated business processes such as lead generation and customer interaction. Given the widespread use of WordPress across Europe, especially in small to medium enterprises and digital marketing agencies, the impact can be broad. Compromised sites may also be used to distribute malware or conduct phishing campaigns targeting European users. The lack of required authentication lowers the barrier to attack, increasing the likelihood of exploitation. Additionally, regulatory frameworks such as GDPR impose strict requirements on data protection, and exploitation of this vulnerability could lead to compliance violations and reputational damage.

Immediate mitigation involves updating the GeekyBot plugin to a version that addresses this vulnerability once released by the vendor. In the absence of an official patch, organizations should implement manual input validation and output escaping for the chat message field to prevent script injection. Restrict access to the WordPress administrative interface using IP whitelisting or VPNs to limit exposure. Deploy Web Application Firewalls (WAFs) with rules specifically targeting XSS payloads to detect and block malicious requests. Regularly audit and monitor administrative access logs for unusual activity indicative of exploitation attempts. Educate administrators on the risks of clicking unknown links or executing unexpected scripts within the admin dashboard. Consider disabling or removing the plugin if it is not essential to reduce the attack surface. Finally, implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context.