Rox Appointment Booking < 1.2.0 - Unauthenticated Holiday Schedule Modification via REST API (CVE-2026-87891) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-87891

Rox Appointment Booking < 1.2.0 - Unauthenticated Holiday Schedule Modification via REST API

Answer in brief

CVE-2026-87891 records a Unknown severity vulnerability in Rox Appointment Booking < 1.2.0 - Unauthenticated Holiday Schedule Modification via REST API. The current sources do not mark it as known exploited. The current feed maps Unknown/Rox Appointment 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 12, 2026Updated Sep 12, 2026Source checked Sep 12, 2026First seen by HOL Sep 12, 2026Material review Sep 12, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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/Rox Appointment Booking (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Rox Appointment Bookinggeneric	>=0 <1.2.0	1.2.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Rox Appointment Booking.
Review the reported fix. Update Unknown/Rox Appointment Booking to 1.2.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 12, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source description

The Rox Appointment Booking WordPress plugin before 1.2.0 does not perform any capability or authorization check when saving its holiday schedule, allowing unauthenticated attackers to overwrite the dates the booking system treats as unavailable, which can block legitimate bookings or open dates the site owner intended to keep closed.

Quoted source text, attributed separately from HOL analysis.