CVE-2025-1410 is a stored cross-site scripting vulnerability (CWE-79) in the Pie Calendar – Events Calendar Made Simple WordPress plugin by apexws. The flaw exists in the handling of the piecal shortcode, where user input is not properly sanitized or escaped before being output in web pages. Authenticated users with contributor or higher privileges can exploit this to inject arbitrary JavaScript code that executes in the context of other users viewing the injected pages. The vulnerability affects all versions up to and including 1.2.5. The CVSS 3.1 vector indicates network attack vector, low attack complexity, privileges required at low level, no user interaction, scope changed, and low confidentiality and integrity impact without availability impact.

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via the piecal shortcode. These scripts execute in the browsers of users who visit the infected pages, potentially leading to session hijacking, defacement, or other client-side attacks. The vulnerability compromises confidentiality and integrity to a limited extent but does not affect availability. There are no known exploits in the wild at this time.

No official patch or fix is currently available for this vulnerability. Users should monitor the vendor's advisory channels for updates. As a temporary mitigation, restrict contributor-level access to trusted users only and consider disabling or removing the Pie Calendar plugin until a fix is released. Review and sanitize any user-generated content involving the piecal shortcode to prevent injection. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.