CVE-2026-6910: Safistudio Bookero.pl – System Rezerwacji Online

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Bookero.pl – system rezerwacji online plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `bookero_products` shortcode's `hide_products` (and `filter_products`) attributes in versions up to and including 2.2. This is due to insufficient input sanitization and output escaping in the `bookero_products()` function — the raw attribute value is concatenated directly into an inline `<script>` block without any escaping. This makes it possible for authenticated attackers with contributor-level access and above to inject arbitrary web scripts into pages that will execute whenever a user accesses the injected page.

Affected products

• Safistudio Bookero.pl – System Rezerwacji Online: up to and including 2.2

Published 2026-07-09. Last modified 2026-07-09.