CVE-2026-1941 identifies a stored Cross-Site Scripting (XSS) vulnerability in the WP Event Aggregator plugin for WordPress, which imports events from Eventbrite, Meetup, and iCal into event calendars. The vulnerability exists in all versions up to and including 1.8.7 due to insufficient sanitization and escaping of user-supplied attributes within the 'wp_events' shortcode. Authenticated users with Contributor-level or higher privileges can exploit this flaw by injecting arbitrary JavaScript code into event pages. When other users access these pages, the malicious scripts execute in their browsers, potentially allowing attackers to hijack sessions, steal cookies, perform actions on behalf of users, or deface content. The vulnerability is network exploitable without user interaction, but requires authentication with at least Contributor privileges, which lowers the attack complexity. The CVSS 3.1 score is 6.4, indicating a medium severity level with partial confidentiality and integrity impact but no availability impact. No patches or known exploits are currently documented, but the risk remains significant for websites using this plugin, especially those with multiple contributors or public-facing event pages. The vulnerability falls under CWE-79, highlighting improper neutralization of input during web page generation. The scope is confined to WordPress sites using this specific plugin, but given WordPress's widespread use, the potential attack surface is considerable. The vulnerability underscores the importance of proper input validation and output encoding in web applications, particularly in plugins that accept user-generated content.

For European organizations, this vulnerability could lead to unauthorized script execution on their WordPress event pages, compromising user data confidentiality and integrity. Attackers could hijack user sessions, steal authentication tokens, or manipulate event information, undermining trust and potentially causing reputational damage. Organizations relying on event management for customer engagement or internal communications may face disruptions or data leakage. Since the exploit requires authenticated Contributor-level access, insider threats or compromised accounts pose a significant risk. The vulnerability does not affect availability directly but can facilitate further attacks that degrade service or lead to data breaches. Given the popularity of WordPress and event plugins in Europe, especially among SMEs and cultural institutions, the impact could be widespread. Additionally, GDPR considerations mean that any data breach resulting from exploitation could lead to regulatory penalties. The medium severity rating suggests a moderate but actionable risk, emphasizing the need for timely mitigation to protect organizational assets and user privacy.

European organizations should immediately audit their WordPress installations to identify the presence of the WP Event Aggregator plugin and verify the version in use. Since no official patches are currently available, temporary mitigations include restricting Contributor-level access to trusted users only and implementing strict role-based access controls. Administrators should sanitize and validate all user inputs related to event creation and shortcode attributes manually or via security plugins that enforce input filtering. Employing Web Application Firewalls (WAFs) with custom rules to detect and block suspicious script injections in event pages can reduce exploitation risk. Monitoring logs for unusual activity or script injections is critical for early detection. Organizations should also educate contributors about secure content practices and the risks of injecting untrusted code. Once a patch is released, prompt updating of the plugin is essential. Additionally, consider isolating event management functionality or using alternative plugins with better security track records. Regular backups and incident response plans should be in place to recover from potential compromises.