EUVD-2026-87890
GHSA-36wf-cx88-gfjh
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Staff is an operator-level role not admin, so PR:L (vendor PR:H overstates); network AJAX with no UI; partial read/tamper of other staff records and PII gives C:L/I:L, A:N.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
6DescriptionCVE.org
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.
AnalysisAI
Authenticated staff-level users of the WordPress plugin Online Scheduling and Appointment Booking System (all versions before 28.3) can read, modify, and delete appointment and payment records belonging to other staff members, including the customer personal information attached to those records. The flaw is a missing ownership check on the plugin's staff-role AJAX actions: an attacker only needs a valid staff account and a record identifier belonging to someone else, with no user interaction and remote reachability. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated account with the plugin's staff-level role on a site running Online Scheduling and Appointment Booking System before version 28.3; the attacker then calls the plugin's staff-role AJAX actions with record identifiers belonging to other staff. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but low-priority issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade the Online Scheduling and Appointment Booking System plugin to version 28.3 or later, which is the fixed release cited by the advisory; installations remain vulnerable at every version below 28.3. … Detailed patch versions, workarounds, and compensating controls in full report. |
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