CVE-2026-39447 HIGH

CVE-2026-39447: WordPress Simply Schedule Appointments plugin <= 1.6.10.6 - Cross Site Scripting (XSS) vulnerability

Vendor Nsquared
Product Simply Schedule Appointments
Weakness CWE-79 · XSS
Published June 15, 2026
Last update June 15, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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

Explanation of Vulnerability in Simple Terms

02Summary

Simply Schedule Appointments versions up to 1.6.10.6 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the application. An attacker can craft a malicious link that, when visited by a site administrator or user, executes arbitrary JavaScript in their browser. This can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim.

What an attacker can do

03Attacker Capabilities

Inject and execute malicious JavaScript in a user's browser to steal session tokens, credentials, or perform actions as that user.

Potential impact on your site

04Site Impact

Administrators and users who click attacker-supplied links risk account compromise, data theft, and unauthorized changes to site content or settings.

Conditions required to exploit

05Prerequisites

Attacker must trick a user into clicking a malicious link or visiting a crafted page (user interaction required). No authentication needed.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

Related vulnerabilities

08Related CVE

CVE-2026-8489 Ultimate Member <= 2.11.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Non-HTML Custom Textarea Profile Field CVE-2026-57366 WordPress WPAdverts plugin <= 2.3.1 - Cross Site Scripting (XSS) vulnerability CVE-2026-57357 WordPress Search Atlas SEO plugin <= 2.6.6 - Reflected Cross Site Scripting (XSS) vulnerability CVE-2026-57426 WordPress Modula - PRO plugin <= 2.10.8 - Cross Site Scripting (XSS) vulnerability CVE-2026-8351 RTMKit <= 2.0.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Advanced Heading Widget 'Background Text' Parameter