Vulnerability · Published Aug 2, 2026 · Assigned by WPScan

CVE-2026-16540Simply Schedule Appointments < 1.6.12.6 - Unauthenticated Appointment Data Disclosure and Mass Deletion via purge Endpoint

High 7.5

In plain English

A high-severity incorrect authorization in Simply Schedule Appointments from Unknown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 64.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

The Simply Schedule Appointments WordPress plugin before 1.6.12.6 does not correctly restrict a bulk appointment operation to the requester's own records, allowing unauthenticated users to retrieve the personal data of all appointments across the site and, on premium editions, to permanently delete them.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Simply Schedule Appointments	0 – before 1.6.12.6

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://wpscan.com/vulnerability/c3829294-c388-4151-9e25-a3eac7b1f1c6/ exploit, vdb-entry, technical-description