CVE-2026-15401

VikBooking Hotel Booking Engine & PMS <= 1.8.13 - Unauthenticated Stored Cross-Site Scripting via Custom Field 'vbfX' Parameter

The VikBooking Hotel Booking Engine & PMS plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vbfX' parameter in all versions up to, and including, 1.8.13 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. The vbfX custom-field value is stored via the public-facing saveorder task, which has no capability or authentication check enforced by default, enabling fully unauthenticated submission of malicious payloads.

We have discovered 549 live websites that are affected by CVE-2026-15401.

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Affected Software

Product  Vikbooking
Category Wordpress Plugins
Vulnerable Domains549 live websites (100% of Vikbooking install base)
Vulnerable Versions
  • from 0 through 1.8.13
Vulnerable Versions Count35 versions ( 100% of all versions)


Common Weakness Enumeration

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')



Details

  • Published - Jul 24, 2026
  • Updated - Jul 24, 2026

Credits

  • Wordfence PRISM (finder)

Website Distribution by Country

Number of websites using CVE-2026-15401
United States91 websites


Italy90 websites
Germany58 websites
France35 websites
Greece35 websites
Spain29 websites
GB23 websites
Cyprus14 websites
Denmark10 websites
Switzerland10 websites

Website Distribution by TLD

Number of websites using CVE-2026-15401
.com270 websites
.it63 websites
.de18 websites
.co.uk10 websites
.nl9 websites
.es8 websites
.net7 websites
.ch6 websites
.dk6 websites
.com.au6 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-15401

Top websites that are affected by CVE-2026-15401. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
************.com GB***,***
**************.com Italy*,***,***
******************.de Germany*,***,***
********************************.com United States*,***,***
*******.com United States*,***,***
**************.fr France*,***,***
*******************.ca Canada*,***,***
***************.com United States*,***,***
***************.com United States*,***,***
*************.com Ireland*,***,***
See full domain list

FAQ

CVE-2026-15401 is Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Vikbooking
A total of 549 websites have been identified as vulnerable to CVE-2026-15401, based on global website indexing conducted by WebTechSurvey.
The Vikbooking is affected by the CVE-2026-15401 vulnerability.
Vikbooking versions up to and including 1.8.13 are vulnerable to CVE-2026-15401.

References