CVE-2025-13968 describes a stored cross-site scripting vulnerability in the Starboard Suite Reservation Calendars plugin for WordPress. The issue exists in the handling of shortcode attributes in the [starboard-suite-lightbox] shortcode, where input is not properly sanitized or escaped before being rendered in web pages. This allows authenticated attackers with Contributor-level or higher privileges to inject arbitrary scripts that execute in the context of users viewing the injected content. The vulnerability affects all plugin versions up to and including 3.1.4. No official patch or remediation level has been documented in the available data.

An attacker with Contributor-level or higher access can inject malicious scripts into pages via shortcode attributes. These scripts execute in the browsers of users who access the injected pages, potentially leading to session hijacking, privilege escalation, or other client-side attacks. The vulnerability impacts confidentiality and integrity but does not affect availability. The CVSS 3.1 base score is 6.4 (medium severity), reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and partial impact on confidentiality and integrity.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or removing the Starboard Suite Reservation Calendars plugin if possible. Monitor official vendor channels for updates or patches addressing this vulnerability.