CVE-2026-106603
Received Received - Intake

Authorization Bypass in HollerBox WordPress Plugin

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: Patchstack

Description
Authorization Bypass Through User-Controlled Key vulnerability in Groundhogg HollerBox holler-box allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects HollerBox: from n/a through 2.3.14.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-08
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-106603
EUVD
EUVD-2026-94930

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Groundhogg HollerBox 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

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Executive Summary

This vulnerability is an Authorization Bypass Through User-Controlled Key issue in the Groundhogg HollerBox plugin. It allows attackers to exploit incorrectly configured access control security levels by manipulating user-controlled keys, such as IDs in URLs, to gain unauthorized access to data.

Detection Guidance

Check for unauthorized access attempts by monitoring URL parameters for ID manipulation in HollerBox plugin requests. Look for unusual GET/POST requests targeting endpoints with numeric IDs. Enable WordPress debug logs to track suspicious activity.

Impact Analysis

Attackers could access sensitive information from other users by manipulating IDs in URLs. This could lead to data exposure or unauthorized actions, depending on the plugin's functionality and the data it handles.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating compliance requirements under GDPR, HIPAA, or other regulations that mandate strict access controls and data protection measures.

Mitigation Strategies

Update HollerBox plugin to version 2.3.15 or later immediately. If updating is not possible, disable the plugin temporarily until a patch is applied. Review user permissions and access controls to ensure proper restrictions are in place.

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