CVE-2026-15759
Received Received - Intake

Stored XSS in ChatHelp WordPress Plugin

Publication date: 2026-07-17

Last updated on: 2026-07-17

Assigner: Wordfence

Description
The ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'number' and 'group' Shortcode Attributes in all versions up to, and including, 3.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-07-17
Last Modified
2026-07-17
Generated
2026-07-17
AI Q&A
2026-07-17
EPSS Evaluated
N/A
NVD
CVE-2026-15759
EUVD
EUVD-2026-45135

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
woocommerce chat_to_order to 3.5.1 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the ChatHelp WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts via the 'number' and 'group' shortcode attributes. The issue arises due to insufficient input sanitization and output escaping, enabling arbitrary code execution when users access infected pages.

Detection Guidance

This vulnerability requires checking WordPress installations for the affected plugin versions. Inspect the plugin files for the ChatHelp – Click to Chat Button plugin up to version 3.5.1. Look for unsanitized input in 'number' and 'group' shortcode attributes. Use WordPress admin dashboard to review installed plugins or check server files for the plugin directory.

Impact Analysis

If you use this WordPress plugin, attackers could steal user sessions, deface your website, or redirect visitors to malicious sites. The impact depends on user privileges; contributors or higher can escalate attacks. Regular users visiting compromised pages may have their data exposed or accounts hijacked.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR (data protection) and HIPAA (health data privacy). If user data is stolen or modified, organizations may face fines, legal action, or reputational damage. Compliance requires patching and monitoring for unauthorized access.

Mitigation Strategies

Update the ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form plugin to the latest version beyond 3.5.1 to patch the vulnerability.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-15759. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart