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Groundhogg CVE-2026-81741

| EUVDEUVD-2026-74709 MEDIUM
URL Redirection to Untrusted Site (Open Redirect) (CWE-601)
2026-09-09 WPScan GHSA-m96f-c5vh-h7cm
4.7
CVSS 3.1 · Vendor: WPScan
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Severity by source

Vendor (WPScan) PRIMARY
4.7 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
vuln.today AI
4.7 MEDIUM

Network-accessible, no auth needed, but requires victim to click a crafted link; scope changes as redirect escapes the site boundary with limited confidentiality exposure via phishing.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (WPScan).

CVSS VectorVendor: WPScan

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

4
Analysis Generated
Sep 09, 2026 - 16:37 vuln.today
Patch available
Sep 09, 2026 - 07:03 EUVD
CVE Published
Sep 09, 2026 - 06:00 cve.org
MEDIUM 4.7
CVE Published
Sep 09, 2026 - 06:00 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

Open redirect in the Groundhogg CRM, Newsletters, and Marketing Automation WordPress plugin (versions before 4.7.2) allows unauthenticated attackers to weaponize the plugin's own email preference confirmation flow as a phishing vector. The confirmation endpoint fails to validate that its redirect target parameter points to the same site host, so a crafted confirmation link can silently forward the clicking visitor to any attacker-controlled URL. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation The Groundhogg plugin must be installed and active on a WordPress site (version < 4.7.2) with its email preference confirmation flow enabled - this is a standard default feature of the plugin, not a non-default configuration. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 4.7 is appropriate for an open redirect: the attack requires user interaction (UI:R) - a victim must click a crafted link - which meaningfully caps exploitability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Update the Groundhogg plugin to version 4.7.2 or later, which is the vendor-released patch as confirmed by the affected version range in EUVD. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-81741 vulnerability details – vuln.today

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