Medium · CVSS 5.3CVE-2026-86475

Appointment Hour Booking < 1.5.95 - Unauthenticated Booking Capacity Bypass via Multi-Appointment SubmissionCVE-2026-86475

Answer in brief

CVE-2026-86475 records a Medium severity (CVSS 5.3) vulnerability in Appointment Hour Booking < 1.5.95 - Unauthenticated Booking Capacity Bypass via Multi-Appointment Submission. The current sources do not mark it as known exploited. The current feed maps Unknown/Appointment Hour Booking (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Oct 31, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/Appointment Hour Booking (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Appointment Hour Bookinggeneric	>=0 <1.5.95	1.5.95

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Appointment Hour Booking.
Review the reported fix. Update Unknown/Appointment Hour Booking to 1.5.95 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.