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    CVE-2026-16540

    The Simply Schedule Appointments WordPress plugin before 1.6.12.6 does not correctly restrict a bulk appointment operation to the requester's own records, allowing unauthenticated users to retrieve the personal data of all appointments across the site and, on premium editions, to permanently delete them.

    Published:Aug 2, 2026
    Last Modified:Aug 7, 2026
    EPS:Aug 2, 2026
    EPSS Score:0.00358
    CVSS Score:7.5

    Affected Products

    Vendor
    Nsqua
    Product
    Simply Schedule Appointments
    Vendor
    Wordpress
    Product
    Wordpress

    Exploits

    https://github.com/huseyn0vs/CVE-2026-16540-SimplyScheduleAppointments

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-15254 (CVSS 6.5) — The Simply Schedule Appointments WordPress plugin before 1.6.12.11 does not perform a capability check on an a…
    CVE-2024-7877 (CVSS 4.8) — The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.5…
    CVE-2024-7876 (CVSS 4.8) — The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.5…
    CVE-2024-7129 (CVSS 7.2) — The Appointment Booking Calendar WordPress plugin before 1.6.7.43 does not escape template syntax provided via…
    CVE-2024-1760 (CVSS 4.3) — The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnera…
    CVE-2023-50851 (CVSS 7.6) — Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in N Square…
    CVE-2022-2374 (CVSS 4.8) — The Simply Schedule Appointments WordPress plugin before 1.5.7.7 does not sanitise and escape some of its sett…
    CVE-2022-2373 (CVSS 5.3) — The Simply Schedule Appointments WordPress plugin before 1.5.7.7 is missing authorisation in a REST endpoint, …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High