Vulnerability · Published Sep 27, 2026 · Assigned by WPScan

CVE-2026-86839Bookly < 28.3 - Staff+ Appointment and Payment Disclosure, Modification and Deletion via IDOR

Low 3.8

In plain English

A low-severity authorization bypass via user-controlled key in Online Scheduling and Appointment Booking System from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 3.1)3.8Low

Exploit odds (30 days)0.2%top 93.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Online Scheduling and Appointment Booking System	0 – before 28.3

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

References

https://wpscan.com/vulnerability/3ab8b879-3ef7-4aa4-8620-1bde99697dcb/ exploit, vdb-entry, technical-description