CVE-2026-16541

Simply Schedule Appointments <= 1.6.12.16 - Authenticated (Team Member+) Information Exposure

2026-08-13 00:00

Strategic Overview

Status: Patched in 1.6.12.17
Affected Plugin: Simply Schedule Appointments
Affected Version: <= 1.6.12.16
CVSS: 4.3Medium
Weakness type: CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE: CVE-2026-16541

View all Simply Schedule Appointments vulnerabilities

At a glance

CVE-2026-16541 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the Simply Schedule Appointments WordPress plugin, affecting versions <= 1.6.12.16. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Team Member level or above. The issue is fixed in version 1.6.12.17; sites on affected versions should update now. Disclosed August 2026, reported by Yaswanth Reddy Sunkara.

Vulnerability Overview

The Simply Schedule Appointments plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.12.16. This makes it possible for authenticated attackers, with team member-level access and above, to extract sensitive user or configuration data.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in Simply Schedule Appointments <= 1.6.12.16 takes an account at Team Member level or above. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For Simply Schedule Appointments the fix is 1.6.12.17: builds <= 1.6.12.16 are affected, anything from 1.6.12.17 onward is not.

Remediation

Update to version 1.6.12.17, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: Simply Schedule Appointments 1.6.12.17 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-16541 https://www.wordfence.com/threat-intel/vulnerabilities/id/8e76ee22-b05c-424a-a2a9-8d83811668e0 https://nvd.nist.gov/vuln/detail/CVE-2026-16541

Related records

Same weakness class

Other vulnerabilities in Simply Schedule Appointments

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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