The DSGVO snippet for Leaflet Map and its Extensions plugin for WordPress suffers from a stored cross-site scripting vulnerability (CWE-79) via the `leafext-cookie-time` and `leafext-delete-cookie` shortcodes. This occurs because the plugin does not properly sanitize or escape user input in the shortcode attributes `unset`, `before`, and `after`. Authenticated attackers with contributor or higher privileges can exploit this to inject malicious scripts into pages, which execute in the context of users who access those pages. The vulnerability affects all versions up to 3.1. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, required privileges, no user interaction, scope change, and limited confidentiality and integrity impact.

An attacker with contributor-level or higher access can inject persistent malicious scripts into WordPress pages via vulnerable shortcodes. These scripts execute in the browsers of users who view the infected pages, potentially leading to theft of session tokens, defacement, or other client-side attacks. The impact includes limited confidentiality and integrity loss but no availability impact. The vulnerability requires authenticated access, limiting the attack surface to users with contributor or higher roles.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict contributor-level access to trusted users only and consider disabling or removing the affected plugin if feasible. Monitor for plugin updates from the vendor addressing this vulnerability.