PatchSiren cyber security CVE debrief
CVE-2026-15759 themeatelier CVE debrief
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.
- Vendor
- themeatelier
- Product
- ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form
- CVSS
- MEDIUM 6.4
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-17
- Original CVE updated
- 2026-07-17
- Advisory published
- 2026-07-17
- Advisory updated
- 2026-07-17
Who should care
Users of the ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form plugin for WordPress, particularly those with contributor-level access and above, should be aware of this vulnerability and take immediate action to protect their sites.
Technical 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. The vulnerability exists due to insufficient input sanitization and output escaping, allowing authenticated attackers with contributor-level access and above to inject arbitrary web scripts.
Defensive priority
Medium priority should be given to updating the ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form plugin to a version that addresses this vulnerability.
Recommended defensive actions
- Update the ChatHelp – Click to Chat Button, WooCommerce Chat to Order & Floating Chat Form plugin to a version that addresses this vulnerability.
- Restrict access to the plugin's shortcode attributes to prevent unauthorized modifications.
- Implement additional security measures, such as input validation and output encoding, to prevent similar vulnerabilities.
- Review compensating controls for exposed systems while remediation is scheduled and verified.
- Check relevant monitoring, detection, and logs for exposed assets that need extra review.
- Track exceptions, retest remediated assets, and close the item only after evidence is documented.
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
Evidence notes
The CVE record was published on 2026-07-17T05:16:38.447Z and has not been modified since then. The NVD entry is currently 6.4, MEDIUM severity. Evidence is limited to CVE and NVD data. Defenders should verify product presence, confirm affected versions, and check for updates or mitigations.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-17T05:16:38.447Z and has not been modified since then.