CVE-2026-5399Network attack vector

Stored XSS via unquoted slider attributes

Published Sep 10, 2026 · Updated Sep 10, 2026

Stored XSS in Redux Framework 4.5.13.1 and earlier allows remote authenticated users to execute scripts when an administrator views a profile. user_meta_save() leaves scalar profile values unsanitized, while Redux_Slider::render() emits them into unquoted attributes after loose numeric validation. Subscriber-level access and a configured Slider field are required; successful exploitation runs attacker-supplied script in the viewing administrator's browser.

CVSS severity6.4
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Redux Framework 4.5.13.1 and earlier allows remote authenticated users to execute scripts when an administrator views a profile. user_meta_save() leaves scalar profile values unsanitized, while Redux_Slider::render() emits them into unquoted attributes after loose numeric validation. Subscriber-level access and a configured Slider field are required; successful exploitation runs attacker-supplied script in the viewing administrator's browser.

The record

CVE
CVE-2026-5399
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Redux WP LLC
Product
Redux Framework
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.5.13.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Redux WP LLC · Redux Frameworkversion=0 <=4.5.13.1

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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