CVE-2025-5559: Bernhard-Riedl Timezonecalculator

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The TimeZoneCalculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'timezonecalculator_output' shortcode in all versions up to, and including, 3.37 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• Bernhard-Riedl Timezonecalculator: up to and including 3.37

Published 2025-06-26. Last modified 2026-06-17.