CVE-2026-15759CWE-79

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

Medium · published July 17, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
27.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00349 · 27.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-17T03:43Z
EPSS history
Timeline
  • 17 JUL 03:43Z
    ChatHelp <= 3.5.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'number' and 'group' Shortcode Attributes
    cvelistv5