CVE-2026-6910 Bookero.pl <= 2.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Authenticated attackers can inject arbitrary scripts via shortcode attributes, leading to code execution in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6910?
CVE-2026-6910 is a medium-severity cross-site scripting vulnerability in safistudio Bookero.pl – system rezerwacji online, published on 9 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-6910?
How do I fix CVE-2026-6910?
No fix has been published for CVE-2026-6910 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-6910 being exploited?
There is no known exploitation of CVE-2026-6910 in the wild and no public exploit code.
Sources
Also known as GHSA-vvcw-jcq9-759q.