CVE-2026-86798

Deferred Deferred - Pending Action

Unauthenticated Stored Cross-Site Scripting in HootBoard WordPress Plugin

Publication date: 2026-10-11

Last updated on: 2026-10-13

Assigner: WPScan

Description

The HootBoard WordPress plugin through 3.1.4 does not perform any authorisation check on some of its REST endpoints, and does not escape the values stored through them before outputting them in a public page, allowing unauthenticated users to inject arbitrary web scripts that will execute in the browser of anyone visiting that page, including administrators.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-11

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-11

EPSS Evaluated

2026-10-18

NVD

CVE-2026-86798

EUVD

EUVD-2026-96768

Affected Vendors & Products

Vendor	Product	Version / Range
Unknown	HootBoard	0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is an unauthenticated stored cross-site scripting (XSS) flaw in the HootBoard WordPress plugin versions up to 3.1.4. It allows attackers to inject malicious scripts into public pages without authentication. The scripts execute in the browsers of visitors, including administrators, when they view the affected page.

Detection Guidance

Check if the HootBoard WordPress plugin version 3.1.4 or below is installed. Inspect network traffic for unauthenticated requests to the Board Configuration REST endpoint. Look for stored XSS payloads in public pages rendered by the plugin.

Impact Analysis

Unauthenticated attackers can inject malicious scripts that execute in the browsers of anyone visiting the affected page. This could lead to theft of session cookies, account takeover, or defacement of the website. Administrators are particularly at risk as their elevated access could be exploited.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations may face fines or penalties for failing to protect user data adequately.

Mitigation Strategies

Immediately update the HootBoard plugin to the latest version if available. If no update exists, disable or remove the plugin until a patch is released. Monitor for suspicious activity or unauthorized script injections in public pages.

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