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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-86839
StatePUBLISHED
AssignerWPScan
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-27 06:17:14 UTC
Updated2026-09-28 16:38:58 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 3.8 LOW from ADP

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

EPSS: 0.001520000 probability, percentile 0.037000000 (date 2026-09-29)

Problem Types: CWE-639 | CWE-639 Authorization Bypass Through User-Controlled Key | CWE-639 CWE-639 Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED3.8LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary3.8LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Unknown Online Scheduling And Appointment Booking System affected 28.3 semver Not specified

References

ReferenceSourceLinkTags
wpscan.com/vulnerability/3ab8b879-3ef7-4aa4-8620-1bde99697dcb [email protected] wpscan.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Vũ Quang Huy (en)

CNA: WPScan (en)

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