CVE-2026-86839 | BDVDB-2026-379972 Detail

Online Scheduling and Appointment Booking System

Description#

The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not verify that appointment and payment records requested through its staff-role AJAX actions belong to the requesting staff member, allowing authenticated attackers with a staff-level account to view, modify and delete other staff members' appointments and payments, including the associated customer's personal information.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-639 Authorization Bypass Through User-Controlled Key

References#

https://wpscan.com/vulnerability/3ab8b879-3ef7-4aa4-8620-1bde99697dcb/

Exploit#

https://wpscan.com/vulnerability/3ab8b879-3ef7-4aa4-8620-1bde99697dcb/

History#

Version 12026-09-27Record published in the CVE List.
Version 22026-09-28Most recent update recorded in the CVE List.

Published

Published: 2026-09-27
Last modified: 2026-09-28

Vendor information

Vendor: Not stated
Product: Online Scheduling and Appointment Booking System

Score

3.8 Low

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 6.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Insecure Direct Object Reference

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 28.3
Fixed
28.3

Scoring System

CVSS v4.0

Not available

CVSS v3.1

3.8 Low

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).