CVE-2026-81741Network attack vector

Phishing redirects via unrestricted confirmation destination

Published Sep 9, 2026 · Updated Sep 9, 2026

Open redirect in Groundhogg before 4.7.2 allows remote attackers to send visitors to external sites through crafted confirmation links. The email-preference confirmation flow accepts the redirect_to parameter as a post-confirmation destination without restricting its host to the WordPress site. No account is required to create the link, but a visitor must follow it; the redirect can lend the site's trusted address to phishing without directly changing site data.

CVSS severity4.7
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Groundhogg before 4.7.2 allows remote attackers to send visitors to external sites through crafted confirmation links. The email-preference confirmation flow accepts the redirect_to parameter as a post-confirmation destination without restricting its host to the WordPress site. No account is required to create the link, but a visitor must follow it; the redirect can lend the site's trusted address to phishing without directly changing site data.

The record

CVE
CVE-2026-81741
Published
Sep 9, 2026
Updated
Sep 9, 2026
Vendor
Groundhogg Inc.
Product
Groundhogg
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Groundhogg Inc. · Groundhoggversion=0 <4.7.2

Published CVSS scores

4.7CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Spearphishing Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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