Groundhogg redirects email-preference confirmations to attacker-selected URLs
Groundhogg before 4.7.2 does not constrain email-preference confirmation redirects to the site's host. An unauthenticated attacker can craft a link that redirects a visitor to an external destination, making the site's trusted address usable as a step in a phishing lure.
- Component
- Groundhogg — CRM, Newsletters, and Marketing Automation
- Affected
- < 4.7.2
- Safe version
4.7.2- Published
- Sep 09, 2026
This CVE was published Sep 09, 2026 and is one of 3 known issues for this plugin.
Update, patch or deactivate.
Update Groundhogg to 4.7.2 or later. The authoritative record identifies this release as outside the affected range.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Groundhogg — CRM, Newsletters, and Marketing Automation WordPress plugin before 4.7.2 does not restrict the redirect target of its email preference confirmation flow to the site's own host, allowing unauthenticated attackers to redirect visitors to an arbitrary external URL by way of a crafted link.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N