# CVE-2026-120836: WordPress Meta Box – WordPress Custom Fields Framework plugin <= 5.15.3 - Broken Access Control vulnerability

Status: published. Published: 2026-11-07. Updated: 2026-11-07.

Missing Authorization vulnerability in eLightUp Meta Box – WordPress Custom Fields Framework meta-box allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Meta Box – WordPress Custom Fields Framework: from n/a through 5.15.3.

## Remediation

- fix: Update the WordPress Meta Box – WordPress Custom Fields Framework plugin to the latest available version (at least 5.15.4). (source: CNA: Patchstack)

## Affected products and versions

- eLightUp / Meta Box – WordPress Custom Fields Framework (meta-box): ≥ 0; ≤ 5.15.3 (affected, custom); unaffected at 5.15.4. Source: CNA: Patchstack

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: Patchstack

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-862

## Exploit evidence

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

## References

- https://patchstack.com/database/wordpress/plugin/meta-box/vulnerability/wordpress-meta-box-wordpress-custom-fields-framework-plugin-5-15-3-broken-access-control-vulnerability?_s_id=cve (CNA: Patchstack; vdb-entry)

## Provenance

- CNA: Patchstack: https://www.cve.org/CVERecord?id=CVE-2026-120836; retrieved 2026-11-07; source updated 2026-11-07

Revision: 2dcaa1ee8314fcf0f0b1f4fffc41fc516c0a6d44aa6686084f73018699d22533

Canonical: https://y2.dev/cve/CVE-2026-120836

## Agent and API access

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- 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.

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- 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.

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