CVE-2026-73395

WordPress Booking calendar, Appointment Booking System plugin <= 3.2.36 - Insecure Direct Object References (IDOR) vulnerability

Unauthenticated Insecure Direct Object References (IDOR) in Booking calendar, Appointment Booking System <= 3.2.36 versions.

We have discovered 655 live websites that are affected by CVE-2026-73395.

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Affected Software

Product  Booking Calendar
Category Wordpress Plugins
Vulnerable Domains655 live websites (100% of Booking Calendar install base)
Vulnerable Versions
  • from 0 through 3.2.36
Vulnerable Versions Count5 versions ( 100% of all versions)


Common Weakness Enumeration

CWE-639 Authorization Bypass Through User-Controlled Key



Details

  • Published - Aug 18, 2026
  • Updated - Aug 18, 2026

Credits

  • Jakub Herman | Patchstack Bug Bounty Program (finder)

Website Distribution by Country

Number of websites using CVE-2026-73395
United States145 websites


Germany82 websites
GB45 websites
France40 websites
Italy31 websites
Netherlands27 websites
Spain26 websites
Poland20 websites
Belgium16 websites
Switzerland16 websites

Website Distribution by TLD

Number of websites using CVE-2026-73395
.com252 websites
.de57 websites
.fr32 websites
.co.uk26 websites
.nl24 websites
.it24 websites
.org22 websites
.pl19 websites
.cz14 websites
.net14 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-73395

Top websites that are affected by CVE-2026-73395. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
***.cz Czech Republic***,***
******.***.gy Guyana***,***
******************.***.uk GB***,***
*******.it Germany*,***,***
*********.org United States*,***,***
*******************.de Sweden*,***,***
*********.ch Switzerland*,***,***
*****.it Italy*,***,***
*****************.org Germany*,***,***
********.ch Switzerland*,***,***
See full domain list

FAQ

CVE-2026-73395 is Authorization Bypass Through User-Controlled Key in Booking Calendar
A total of 655 websites have been identified as vulnerable to CVE-2026-73395, based on global website indexing conducted by WebTechSurvey.
The Booking Calendar is affected by the CVE-2026-73395 vulnerability.
Booking Calendar versions up to and including 3.2.36 are vulnerable to CVE-2026-73395.