CVE-2026-5400 json
Redux Framework <= 4.5.13 - Authenticated (Subscriber+) Cross-Site Scripting via User Input
published 2026-09-19 50 d ago modified 2026-09-21 48 d ago also EUVD-2026-83556
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- github.com/reduxframework/redux-framework#4112 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 50 d ago
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- davidanderson Redux Framework
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
- github.com /reduxframework/redux-framework/pull/4112/changes
- wordfence.com /threat-intel/vulnerabilities/id/ca5b1ff6-19c5-4384-ae63-faf1f40122e7?source=cve
- plugins.trac.wordpress.org /browser/redux-framework/trunk/redux-core/inc/fields/media/class-redux-media.php#L233
- plugins.trac.wordpress.org /browser/redux-framework/tags/4.5.10/redux-core/inc/fields/media/class-redux-media.php#L233
- plugins.trac.wordpress.org /browser/redux-framework/trunk/redux-core/inc/fields/media/class-redux-media.php#L337
- plugins.trac.wordpress.org /browser/redux-framework/tags/4.5.10/redux-core/inc/fields/media/class-redux-media.php#L337
- plugins.trac.wordpress.org /browser/redux-framework/trunk/redux-core/inc/extensions/users/class-redux-extension-users.php#L1034
- plugins.trac.wordpress.org /browser/redux-framework/tags/4.5.10/redux-core/inc/extensions/users/class-redux-extension-users.php#L1034
- plugins.trac.wordpress.org /changeset?reponame=&new=3688279%40redux-framework%2Ftags%2F4.5.14&old=3582185%40redux-framework%2Ftags%2F4.5.
- plugins.trac.wordpress.org /changeset/3688279/redux-framework/trunk/redux-core/inc/fields/media/class-redux-media.php
Sources
- CVE List CVE-2026-5400
- NVD CVE-2026-5400
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.