Threat intelligence

ChatHelp <= 3.5.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'number' and 'group' Shortcode Attributes

CVE-2026-15759 · chat-help

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Chat Help at a vulnerable version. How SiteRespond intelligence works

Vulnerability: ChatHelp <= 3.5.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'number' and 'group' Shortcode Attributes
Affected software: chat-help(Plugin)
Affected versions: ≤ 3.5.1
Authentication: Authenticated (see advisory title)
Vulnerability type: Cross-site scripting
CVE: CVE-2026-15759
Published: 16 July 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory c3ec4978-0d51-4ca1-b0cf-81aaa4d43f7b). Methodology and redistribution notes

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