CVE-2025-14387 is a stored cross-site scripting vulnerability identified in the LearnPress plugin for WordPress, a widely used Learning Management System (LMS) plugin. The flaw exists in all versions up to and including 4.3.1 due to insufficient sanitization of user input and inadequate output escaping during the generation of web pages. This allows authenticated users with Subscriber-level privileges or higher to inject arbitrary JavaScript code into pages managed by the plugin. When other users access these compromised pages, the injected scripts execute in their browsers, potentially leading to session hijacking, theft of sensitive information, or unauthorized actions performed on behalf of the victim. The vulnerability requires no user interaction beyond visiting the affected page, but does require the attacker to have at least low-level authenticated access, which is common in many WordPress deployments where user registration is enabled. The CVSS 3.1 base score of 6.4 reflects a medium severity, with network attack vector, low attack complexity, and privileges required. The scope is changed, indicating that the vulnerability can affect resources beyond the initially compromised component. There are currently no known exploits in the wild, but the presence of this vulnerability in a popular LMS plugin poses a significant risk to organizations relying on WordPress for e-learning. The lack of available patches at the time of publication necessitates immediate mitigation efforts to reduce exposure.

For European organizations, especially educational institutions, training providers, and enterprises using WordPress-based LMS solutions, this vulnerability could lead to unauthorized access to user sessions, theft of personal data, and potential compromise of administrative accounts if attackers escalate privileges. The ability for low-privilege users to inject scripts undermines the integrity and confidentiality of the platform, potentially damaging trust and violating data protection regulations such as GDPR. Attackers could exploit this to conduct phishing campaigns, spread malware, or manipulate course content. Although availability is not directly impacted, the reputational damage and compliance risks are significant. Since WordPress is widely adopted across Europe, and LearnPress is a popular LMS plugin, the threat surface is considerable. Organizations with open user registration or large subscriber bases are at higher risk. The vulnerability could also be leveraged as a foothold for further network intrusion or lateral movement within organizational IT environments.

Organizations should immediately audit their WordPress installations to identify the use of LearnPress plugin versions up to 4.3.1 and plan for prompt updates once patches are released by the vendor. Until patches are available, restrict user registration and limit Subscriber-level privileges to trusted users only. Implement strict input validation and output encoding at the application level if possible. Deploy Web Application Firewalls (WAFs) with rules specifically targeting XSS attack patterns to block malicious payloads. Monitor logs for unusual script injection attempts or unexpected user behavior. Educate administrators and users about the risks of XSS and encourage cautious handling of links and content within the LMS. Regularly back up LMS data to enable recovery in case of compromise. Consider isolating the LMS environment from critical internal networks to reduce lateral movement risk. Finally, subscribe to vendor and security mailing lists to receive timely updates on patches and exploit reports.