Redux Media filter values become stored script

A Subscriber or higher role can store malicious nested Media-field values because user_meta_save() does not sanitize those nested arrays sufficiently. The render() method then emits filter CSS values without appropriate escaping, allowing script when affected output is viewed. The exact request route and nested key are not disclosed. Authoritative affected range: <= 4.5.13. No fixed release is confirmed in this review.

CVE / CNA score 6.4 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Redux Framework
Plugin slug: redux-framework
Affected: <= 4.5.13
Safe version: See mitigation notes
Published: Sep 19, 2026
Weakness: CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Sep 19, 2026 and is one of 7 known issues for this plugin.

What to do

Update, patch or deactivate.

No confirmed fixed release. The 4.5.14 XSS note does not identify nested Media filter CSS values; 4.5.15 names a media URL issue. No matching fixed version is confirmed. Official changelog: https://wordpress.org/plugins/redux-framework/#developers . Validate each nested filter value against a CSS-property-specific schema and escape the final HTML context. Do not treat top-level array sanitization as sufficient; restrict affected fields until updated.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources

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