Cross-site scripting in ThemeAtelier ChatHelp – Click to Chat Button, WooCommerce Chat to…
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ThemeAtelier | ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form | up to 3.5.1 | — | No fix listed | CNA |
- ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form VendorThemeAtelier Affected up to 3.5.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-15759
- 2026-10-03 Alias added: GHSA-m8qm-p7f3-7xr7
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c3ec4978-0d51-4ca1-b0cf-81aaa4d43f7b?source=cve
- https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomButtonsTemplates.php#L76
- https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomButtonsTemplates.php#L66
- https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomButtonsTemplates.php#L138
- https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomShortcode.php#L38
- https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Includes/ChatHelp.php#L192
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3609732%40chat-help&new=3609732%40chat-help
More ThemeAtelier vulnerabilities
- TI-2025-10220 IDonate < 2.1.13 - Unauthenticated User Deletion CVSS 3.1MEDIUM 5.4
- TI-2025-23584 WordPress IDonate plugin <= 2.1.18 - Local File Inclusion vulnerability CVSS 3.1CRITICAL 9.8
- TI-2026-60333 ThemeAtelier Domain For Sale < 3.5.2 Missing Authorization via REST API CVSS 4.0HIGH 8.8
- TI-2026-12868 Missing authorization in ThemeAtelier ChatHelp – Click to Chat Button, WooCommerce Chat… CVSS 3.1HIGH 7.5
- TI-2025-04036 Improper authorization in ThemeAtelier IDonate – Blood Donation, Request And Donor… CVSS 3.1HIGH 8.8
- TI-2025-04034 Improper authorization in ThemeAtelier IDonate – Blood Donation, Request And Donor… CVSS 3.1HIGH 8.8
Sources
- CVE-2026-15759 · CVE Program
- CVE-2026-15759 · NVD
- FIRST EPSS
- GHSA-m8qm-p7f3-7xr7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences