# CVE-2026-81422: Advanced Appointment Booking & Scheduling < 2.7 - Unauthenticated Arbitrary User Registration

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

The Advanced Appointment Booking & Scheduling WordPress plugin before 2.7 does not verify the site's user-registration setting before creating accounts through a publicly accessible shortcode, allowing unauthenticated attackers to register arbitrary user accounts, and be automatically logged in, even when user registration is disabled on the site.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Unknown / Advanced Appointment Booking & Scheduling: ≥ 0; < 2.7 (affected, semver). Source: CNA: WPScan

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-862

## Exploit evidence

- exploit: https://wpscan.com/vulnerability/05f00d47-0014-456b-ade8-994113b5507c/ (CNA: WPScan)

## References

- https://wpscan.com/vulnerability/05f00d47-0014-456b-ade8-994113b5507c/ (CNA: WPScan; exploit, vdb-entry, technical-description)

## Provenance

- CNA: WPScan: https://www.cve.org/CVERecord?id=CVE-2026-81422; retrieved 2026-11-09; source updated 2026-11-09

Revision: 0eaab825788211ace66c1da2780b900b1345fffc408488d6aa6465c328c1dc9c

Canonical: https://y2.dev/cve/CVE-2026-81422

## 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.