Answer in brief
CVE-2026-87966 records a Medium severity (CVSS 5.3) vulnerability in Easy Appointments 4.0 - 4.0.2.1 - Unauthenticated Arbitrary Appointment Modification and Deletion via IDOR. The current sources do not mark it as known exploited. The current feed maps Unknown/Easy Appointments (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
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.
The current feed maps Unknown/Easy Appointments (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/Easy Appointmentsgeneric | >=4.0 <4.0.2.2 | 4.0.2.2 |
Published upstream
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 18, 2026
The Easy Appointments WordPress plugin before 4.0.2.2 does not perform an ownership or authorization check on its unauthenticated appointment-reservation endpoint before updating an existing appointment identified by a request-supplied id, allowing unauthenticated attackers to overwrite, and through a follow-on cleanup delete, arbitrary appointments.
Quoted source text, attributed separately from HOL analysis.