CVE-2026-15665
Received Received - Intake

Stored XSS in Fluent Support WordPress Plugin

Publication date: 2026-07-24

Last updated on: 2026-07-24

Assigner: Wordfence

Description
The Fluent Support – Helpdesk & Customer Support Ticket System plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'redirect-to' Shortcode Attribute in all versions up to, and including, 2.3.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The XSS payload is in a hidden attribute so it only fires in specific browsers when specific access keys are used making exploitation unlikely.

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Meta Information

Published
2026-07-24
Last Modified
2026-07-24
Generated
2026-07-24
AI Q&A
2026-07-24
EPSS Evaluated
N/A
NVD
CVE-2026-15665
EUVD
EUVD-2026-48504

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
fluent_support helpdesk_and_customer_support_ticket_system to 2.3.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the Fluent Support WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts via a 'redirect-to' shortcode attribute. The scripts execute when users access infected pages, though the payload is hidden and requires specific browser conditions, making exploitation unlikely.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the Fluent Support plugin version 2.3.0 or below. Check for malicious 'redirect-to' shortcode attributes in posts or pages. Use WordPress admin panel to review content or query the database for suspicious scripts.

Impact Analysis

If exploited, this vulnerability could allow attackers to steal user sessions, perform actions on behalf of users, or deface websites. It may also enable phishing attacks by injecting malicious content into trusted pages. However, the limited scope of the payload reduces the risk of widespread impact.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality principles. For HIPAA, it may risk exposing protected health information if exploited. Compliance may be impacted if user data is compromised due to insufficient security controls.

Mitigation Strategies

Immediately update the Fluent Support plugin to the latest version. Remove any untrusted user accounts with contributor-level access or higher. Review and sanitize all posts/pages containing the 'redirect-to' shortcode attribute.

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