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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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-15759 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-15759

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-15759 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-15759

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomButtonsTemplates.php

    [email protected]

  • Source reference

    Unverified legacy reference

    URL: https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomButtonsTemplates.php

    [email protected]

  • Source reference

    Unverified legacy reference

    URL: https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomButtonsTemplates.php

    [email protected]

  • Source reference

    Unverified legacy reference

    URL: https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Frontend/Shortcode/CustomShortcode.php

    [email protected]

  • Source reference

    Unverified legacy reference

    URL: https://plugins.trac.wordpress.org/browser/chat-help/tags/3.5.1/src/Includes/ChatHelp.php

    [email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.