# CVE-2026-123670: Essential Real Estate 5.3.5 - Customer+ Email Relay Allowlist Poisoning

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

The Essential Real Estate WordPress plugin before 5.3.6 does not verify that the recipients it allows for its contact email action are legitimate, allowing users with the self-registered Customer role to add any address to that allowlist so that unauthenticated users can then send emails with attacker-controlled content to it through the site.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Unknown / Essential Real Estate: ≥ 5.3.5; < 5.3.6 (affected, semver). Source: CNA: WPScan

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-284

## Exploit evidence

- exploit: https://wpscan.com/vulnerability/04d772fe-001d-4f25-a11a-dedf16064ce4/ (CNA: WPScan)

## References

- https://wpscan.com/vulnerability/04d772fe-001d-4f25-a11a-dedf16064ce4/ (CNA: WPScan; exploit, vdb-entry, technical-description)

## Provenance

- CNA: WPScan: https://www.cve.org/CVERecord?id=CVE-2026-123670; retrieved 2026-11-13; source updated 2026-11-13

Revision: 4e7672c83507248882fb9686e3a24643aceaf667e9509361cb28f3276c05165b

Canonical: https://y2.dev/cve/CVE-2026-123670

## Agent and API access

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- 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.