Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS
CVE-2026-93429 Overview
The VikBooking Hotel Booking Engine & PMS plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'guests[][][documents]' Parameter in all versions up to, and including, 1.8.17 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to possess a valid booking sid/ts pair, which can be obtained by making a standard public booking, as the session token needed to satisfy the JSession::checkToken() gate is emitted in the publicly accessible pre-checkin form.
Critical Impact
Affected Products
- WordPress VikBooking Hotel Booking Engine & PMS: see the vendor advisory for the exact affected versions
Discovery Timeline
- 2026-11-07: CVE-2026-93429 published to the National Vulnerability Database by security@wordfence.com
- 2026-11-07: last updated in the NVD database
Technical Details for CVE-2026-93429
Vulnerability Analysis
CVE-2026-93429 is a Cross Site Scripting weakness (CWE-79: Cross Site Scripting) in WordPress VikBooking Hotel Booking Engine & PMS. Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attacker supplied script runs in another user's browser inside the trusted site.
With a CVSS base score of 7.2, apply the vendor fix and confirm exposure on internet facing and business critical assets first.
Root Cause
The weakness is classified as CWE-79: Cross Site Scripting. Attacker supplied script runs in another user's browser inside the trusted site.
Attack Vector
Based on the CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attack complexity is low complexity.
No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Detection Methods for CVE-2026-93429
Detection Strategies
- Inventory every instance of WordPress VikBooking Hotel Booking Engine & PMS and compare the running version with the affected range above.
- Check external attack surface scans for internet facing instances of the component.
- Run an authenticated vulnerability scan once your scanner ships a check for this CVE.
Monitoring Recommendations
- Forward WordPress VikBooking Hotel Booking Engine & PMS application, access and audit logs to your SIEM for retrospective hunting.
- Alert on new processes, configuration changes or outbound connections from the affected service.
- Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.
How to Mitigate CVE-2026-93429
Immediate Actions Required
- Apply the fixed version of WordPress VikBooking Hotel Booking Engine & PMS named in the vendor advisory.
- Prioritize internet facing and business critical instances first.
- Rescan after the change to confirm the exposure is closed.
Patch Information
Use the fixed version listed in the vendor advisory for WordPress VikBooking Hotel Booking Engine & PMS.
Workarounds
- If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.
CWE References
- CWE-79: Cross Site Scripting More CVEs with this weakness
Technical References
This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.
Frequently asked questions
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