CVE-2026-5400

Received Received - Intake

Stored XSS in Redux Framework WordPress Plugin

Publication date: 2026-09-19

Last updated on: 2026-09-19

Assigner: Wordfence

Description

The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Media field filter values in versions up to, and including, 4.5.13 This is due to insufficient input sanitization of nested array values in the user_meta_save() function and unsafe output of filter CSS values in the render() function without proper escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-19

Last Modified

2026-09-19

Generated

2026-09-20

AI Q&A

2026-09-20

EPSS Evaluated

N/A

NVD

CVE-2026-5400

Affected Vendors & Products

Vendor	Product	Version / Range
redux_framework	redux_framework	to 4.5.13 (inc)

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

The Redux Framework plugin for WordPress has a stored cross-site scripting vulnerability in versions up to 4.5.13. It occurs due to insufficient input sanitization in the Media field filter values and unsafe output of filter CSS values. Authenticated attackers with subscriber-level access or higher can inject malicious scripts into pages.

Detection Guidance

This vulnerability requires checking for the Redux Framework plugin versions up to 4.5.13 in WordPress installations. Inspect plugin files for the Media field filter values and review user_meta_save() and render() functions for improper input sanitization and output escaping. No specific commands are provided in the context.

Impact Analysis

This vulnerability allows attackers to inject arbitrary web scripts into pages. When users access these pages, the scripts execute, potentially stealing user data, session cookies, or performing actions on behalf of the user. It requires authenticated access but can affect all users who view the compromised pages.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection requirements and HIPAA's security rules for protected health information. It may result in data breaches, non-compliance penalties, and loss of trust in systems handling sensitive data.

Mitigation Strategies

Update the Redux Framework plugin to the latest version, which should address the Stored Cross-Site Scripting vulnerability. If updating is not immediately possible, consider disabling the plugin temporarily until an update can be applied.

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