CVE-2026-16541

Simply Schedule Appointments < 1.6.12.17 - Team Member+ User Email Disclosure via Users and Customers REST Endpoints

The Simply Schedule Appointments WordPress plugin before 1.6.12.17 does not restrict the user records returned by some of its REST endpoints to those the requester is entitled to see, allowing users with a low-privileged staff role to disclose the names and email addresses of arbitrary registered users.

We have discovered 6,456 live websites that are affected by CVE-2026-16541.

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Affected Software

Product  Simply Schedule Appointments
Category Wordpress Plugins
Vulnerable Domains6,456 live websites (86% of Simply Schedule Appointments install base)
Vulnerable Versions
  • from 0 through 1.6.12.17
Vulnerable Versions Count166 versions ( 48% of all versions)


Common Weakness Enumeration

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor



Details

  • Published - Aug 15, 2026
  • Updated - Aug 17, 2026

Credits

  • Yaswanth Reddy Sunkara (finder)
  • WPScan (coordinator)

Website Distribution by Country

Number of websites using CVE-2026-16541
United States1,843 websites


Germany1,350 websites
Italy371 websites
GB311 websites
Netherlands256 websites
France251 websites
Canada173 websites
Spain170 websites
Denmark139 websites
Switzerland120 websites

Website Distribution by TLD

Number of websites using CVE-2026-16541
.com2,592 websites
.de983 websites
.it267 websites
.org242 websites
.nl233 websites
.co.uk188 websites
.net146 websites
.fr118 websites
.ch109 websites
.ca98 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-16541

Top websites that are affected by CVE-2026-16541. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
***.org United States**,***
*********.org United States**,***
*****************.org GB***,***
****************.org United States***,***
******.****.br Brazil***,***
****.hu Hungary***,***
**********.***.au France***,***
**************.com United States***,***
***********.com United States***,***
******.***.edu United States***,***
See full domain list

FAQ

CVE-2026-16541 is Exposure of Sensitive Information to an Unauthorized Actor in Simply Schedule Appointments
A total of 6,456 websites have been identified as vulnerable to CVE-2026-16541, based on global website indexing conducted by WebTechSurvey.
The Simply Schedule Appointments is affected by the CVE-2026-16541 vulnerability.
Simply Schedule Appointments versions up to 1.6.12.17 are vulnerable to CVE-2026-16541.
CVE-2026-16541 is resolved in version 1.6.12.17 of Simply Schedule Appointments.