# CVE-2026-109870: User Registration & Membership 5.2.8 - 5.3.1 - Unauthenticated Privilege Escalation via Coupon-Based Payment Bypass

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

The User Registration & Membership  WordPress plugin before 5.3.2 does not verify that a discount coupon applied to a paid membership plan is actually valid for that plan before treating a fully discounted order as paid, allowing unauthenticated users to be granted the role mapped to a paid plan without paying for it, which can lead to privilege escalation up to administrator where a plan is mapped to a privileged role.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Unknown / User Registration & Membership: ≥ 5.2.8; < 5.3.2 (affected, semver). Source: CNA: WPScan

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-269

## Exploit evidence

- exploit: https://wpscan.com/vulnerability/6cac7dd1-2ae5-4b5b-94c7-a8a4a63ef84b/ (CNA: WPScan)

## References

- https://wpscan.com/vulnerability/6cac7dd1-2ae5-4b5b-94c7-a8a4a63ef84b/ (CNA: WPScan; exploit, vdb-entry, technical-description)

## Provenance

- CNA: WPScan: https://www.cve.org/CVERecord?id=CVE-2026-109870; retrieved 2026-11-11; source updated 2026-11-11

Revision: 6d8a1f0466f831ac43a3dca7d7b0e48d0ca0a32c8d4b67e9e54f900b6085acda

Canonical: https://y2.dev/cve/CVE-2026-109870

## 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.