CVE-2026-39447

Deferred Deferred - Pending Action

Unauthenticated XSS in Simply Schedule Appointments

Publication date: 2026-06-15

Last updated on: 2026-06-15

Assigner: Patchstack

Description

Unauthenticated Cross Site Scripting (XSS) in Simply Schedule Appointments <= 1.6.10.6 versions.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-15

Last Modified

2026-06-15

Generated

2026-07-06

AI Q&A

2026-06-16

EPSS Evaluated

2026-07-04

NVD

CVE-2026-39447

Affected Vendors & Products

Vendor	Product	Version / Range
simply_schedule_appointments	simply_schedule_appointments	to 1.6.10.6 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is an unauthenticated Cross Site Scripting (XSS) issue found in Simply Schedule Appointments versions up to and including 1.6.10.6.

Cross Site Scripting (XSS) allows attackers to inject malicious scripts into web pages viewed by other users. Being unauthenticated means the attacker does not need to log in or have any privileges to exploit this vulnerability.

Impact Analysis

Exploitation of this vulnerability can lead to several impacts including the ability for attackers to execute malicious scripts in the context of the affected website.

Compromise of user data confidentiality (C:L)
Integrity of data can be affected (I:L)
Availability of the application may be impacted (A:L)

Since the vulnerability is exploitable remotely without authentication, it poses a significant risk to users and the application.

Hi! I’m here to help you understand CVE-2026-39447. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70