CVE-2026-39694

Simply Schedule Appointments <= 1.6.11.0 - Missing Authorization

2026-02-26 00:00

Strategic Overview

Status: Patched in 1.6.11.1
Affected Plugin: Simply Schedule Appointments
Affected Version: <= 1.6.11.0
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2026-39694

View all Simply Schedule Appointments vulnerabilities

At a glance

CVE-2026-39694 is a medium-severity Missing Authorization vulnerability in the Simply Schedule Appointments WordPress plugin, affecting versions <= 1.6.11.0. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 1.6.11.1; sites on affected versions should update now. Disclosed February 2026, reported by hhhai.

Vulnerability Overview

The Simply Schedule Appointments plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in versions up to, and including, 1.6.11.0. This makes it possible for unauthenticated attackers to perform an unauthorized action.

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 privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Simply Schedule Appointments <= 1.6.11.0 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Simply Schedule Appointments the fix is 1.6.11.1: builds <= 1.6.11.0 are affected, anything from 1.6.11.1 onward is not.

Remediation

Update to version 1.6.11.1, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Simply Schedule Appointments 1.6.11.1 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-39694 https://www.wordfence.com/threat-intel/vulnerabilities/id/d48899b9-b3b3-45d7-b7e1-6a8560becb0b https://nvd.nist.gov/vuln/detail/CVE-2026-39694

Related records

Same weakness class

Other vulnerabilities in Simply Schedule Appointments

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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