# CVE-2026-6820: VikBooking Hotel Booking Engine & PMS Stored XSS in email parameter

Source: https://junglewise.ai/threats/cve-2026-6820-vikbooking-hotel-booking-engine-pms-stored-xss-in-email-parameter  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-08. Updated: 2026-07-08  
License: CC BY 4.0 with a link back

CVE-2026-6820 · Severity: high · CVSS 7.2 · Published 2026-07-08

The VikBooking Hotel Booking Engine & PMS plugin for WordPress, which manages hotel reservations and property systems, contains a security flaw in how it handles email addresses. An unauthorized attacker can submit malicious code through the email field, which then becomes permanently stored on the website. When a staff member or visitor views the affected page, this code can run automatically, potentially allowing the attacker to steal session information or perform unauthorized actions on behalf of other users.

Technologies: [E4jvikwp VikBooking Hotel Booking Engine & PMS](https://junglewise.ai/threats/technologies/vikbooking-hotel-booking-engine-pms). Vendors: [E4jvikwp](https://junglewise.ai/threats/vendors/e4jvikwp).

## Quick answers

**Is CVE-2026-6820 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-6820 being exploited in the wild.

**How severe is CVE-2026-6820?** High severity, with a CVSS score of 7.2, published 8 July 2026.

**Which products and versions are affected?** E4jvikwp VikBooking Hotel Booking Engine & PMS up to, and including, 1.8.8.

**Is there a fix for CVE-2026-6820?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-6820 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-6820?** Check whether you run E4jvikwp VikBooking Hotel Booking Engine & PMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The VikBooking Hotel Booking Engine & PMS plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'email' parameter. This vulnerability exists in all versions up to and including 1.8.8. An unauthenticated attacker can exploit this by submitting a crafted email address containing arbitrary JavaScript. Because the input is stored in the database and later rendered without proper escaping, the script will execute in the context of any user (including administrators) who views the record. This can lead to session hijacking, unauthorized administrative actions, or website defacement. The issue is addressed in version 1.8.9.

## Affected products

- e4jvikwp VikBooking Hotel Booking Engine & PMS up to, and including, 1.8.8

## Timeline

- 2026-07-08: disclosed
- 2026-07-08: advisory

## References

- [https://plugins.trac.wordpress.org/browser/vikbooking/tags/1.8.9/admin/controller.php](https://plugins.trac.wordpress.org/browser/vikbooking/tags/1.8.9/admin/controller.php)
- [https://plugins.trac.wordpress.org/browser/vikbooking/tags/1.8.9/site/controller.php](https://plugins.trac.wordpress.org/browser/vikbooking/tags/1.8.9/site/controller.php)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/e2b4586a-f87d-4a51-8f4e-932d7254518e?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/e2b4586a-f87d-4a51-8f4e-932d7254518e?source=cve)

## Related threats

- [VikBooking Hotel Booking Engine reflected XSS](https://junglewise.ai/threats/cve-2026-95591-improper-neutralization-of-input-during-web-page-generation-cross)
- [e4jvikwp VikBooking Hotel Booking Engine & PMS Reflected XSS](https://junglewise.ai/threats/cve-2026-15346-e4jvikwp-vikbooking-hotel-booking-engine-pms-reflected-xss)
- [VikBooking Hotel Booking Engine & PMS Stored XSS in special_requests](https://junglewise.ai/threats/cve-2026-6818-vikbooking-hotel-booking-engine-pms-stored-xss-in-special-requests)
- [e4jvikwp VikBooking Hotel Booking Engine CSRF to file deletion](https://junglewise.ai/threats/cve-2026-57723-e4jvikwp-vikbooking-hotel-booking-engine-csrf-to-file-deletion)
- [e4jvikwp VikBooking Hotel Booking Engine DOM-based XSS](https://junglewise.ai/threats/cve-2026-42683-e4jvikwp-vikbooking-hotel-booking-engine-dom-based-xss)