Information disclosure in Simply Schedule Appointments

CVE-2026-16541

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.

Vulnerability class: Information Disclosure

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16541: held from 0.002 to 0.004.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

  • Simply Schedule Appointments — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16541?
CVE-2026-16541 is a medium-severity vulnerability in Simply Schedule Appointments, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-08-15.
How severe is CVE-2026-16541?
Medium severity. CVSS v3 base score is 6.5 out of 10.