EUVD-2026-68159
GHSA-c4g6-w433-v47v
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
PR:N because form submission is unauthenticated; S:C because the attack crosses from the public form context into a privileged admin browser session.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
6DescriptionCVE.org
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.
AnalysisAI
Stored Cross-Site Scripting in the Groundhogg - CRM, Newsletters, and Marketing Automation WordPress plugin before version 4.5.13 allows unauthenticated attackers to inject persistent malicious scripts through optional web form fields, which subsequently execute in the browsers of privileged administrative users. Successful exploitation can yield full administrative session compromise, unauthorized rogue account creation, or arbitrary site modification. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the Groundhogg plugin to be installed, active, and at a version prior to 4.5.13 on the target WordPress site, with at least one publicly accessible web form exposing the optional fields that lack server-side escaping. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects the near-zero attacker friction and high potential impact reasonably, though the S:U assignment may understate the true severity - stored XSS that executes inside a privileged admin session crosses a meaningful authorization boundary that many frameworks would score as S:C, which would push the score above 9.0. … 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 4.5.13 or later using the WordPress admin dashboard under Plugins > Installed Plugins > Update, or via WP-CLI with 'wp plugin update groundhogg'. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all WordPress installations to identify Groundhogg versions prior to 4.5.13 and document exposed forms. …
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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