Bookero.pl <= 2.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| safistudio | Bookero.pl – system rezerwacji online | up to 2.2 | — | No fix listed | CNA |
- Bookero.pl – system rezerwacji online Vendorsafistudio Affected up to 2.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-6910
- 2026-10-03 Alias added: GHSA-vvcw-jcq9-759q
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/fd0e6ca6-f6a7-4e81-aea1-3b59de0173d6?source=cve
- https://plugins.trac.wordpress.org/browser/bookeropl/trunk/libraries/bookero-front.php#L174
- https://plugins.trac.wordpress.org/browser/bookeropl/tags/2.1/libraries/bookero-front.php#L174
- https://plugins.trac.wordpress.org/browser/bookeropl/trunk/libraries/bookero-front.php#L173
- https://plugins.trac.wordpress.org/browser/bookeropl/tags/2.1/libraries/bookero-front.php#L173
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3524452%40bookeropl&new=3524452%40bookeropl
Sources
- CVE-2026-6910 · CVE Program
- CVE-2026-6910 · NVD
- FIRST EPSS
- GHSA-vvcw-jcq9-759q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences