# CVE-2026-104812: Redux Framework <= 4.5.16 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'multi_media' Field Array Key

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'multi_media' Field Array Key in all versions due to insufficient input sanitization and output 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. The wp_kses_post sanitization applied at save time operates only on array leaf values, leaving array keys entirely unsanitized; the injected key is then rendered directly into an id="filelist-<KEY>" HTML attribute without esc_attr() in Redux_Multi_Media::render(), allowing attribute breakout.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- davidanderson / Redux Framework: ≥ 0; ≤ 4.5.16 (affected, semver). Source: CNA: Wordfence

## Severity and prioritization

- CVSS 3.1: 6.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N; source: CNA: Wordfence

- CVSS 3.1: 6.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N; source: NVD: security@wordfence.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/9b3d7dfc-d181-4717-a881-e0d04f047a0b?source=cve (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/multi_media/multi_media/class-redux-multi-media.php#L112 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/users/class-redux-extension-users.php#L1022 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/classes/class-redux-helpers.php#L1126 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/changeset/3779521/redux-framework/trunk/redux-core/inc/extensions/multi_media/multi_media/class-redux-multi-media.php (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/classes/class-redux-helpers.php#L1126 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/multi_media/multi_media/class-redux-multi-media.php#L112 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/users/class-redux-extension-users.php#L1022 (security@wordfence.com)

- https://plugins.trac.wordpress.org/changeset/3779521/redux-framework/trunk/redux-core/inc/extensions/multi_media/multi_media/class-redux-multi-media.php (security@wordfence.com)

- https://www.wordfence.com/threat-intel/vulnerabilities/id/9b3d7dfc-d181-4717-a881-e0d04f047a0b?source=cve (security@wordfence.com)

## Provenance

- CNA: Wordfence: https://www.cve.org/CVERecord?id=CVE-2026-104812; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104812; retrieved 2026-11-05; source updated 2026-11-05

Revision: eaaa8a400db15e0013986106a39de4be2eb86de1d01d61215391cff2b5018d3b

Canonical: https://y2.dev/cve/CVE-2026-104812

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.