CVE-2026-17538: medium-severity vulnerability in latepoint Appointment Booking Plugin…
Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress <= 5.6.9 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Customer PII Modification
Published
10Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.4
exploitation probability
—
observed exploitation
nono source reports it
The LatePoint - Appointment Booking & Reservation plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 5.6.9. This is due to the process_step_customer() function using is_user_logged_in() as the sole gate before merging POSTed customer data into an existing LatePoint customer, without any ownership checks. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify the personal information (first name, last name, email, phone, notes) of arbitrary LatePoint customers, and, when the contact_merge setting is 'phone', to overwrite the victim's email address and take over the account via a password reset.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Affected products
latepoint · Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPressRelated CVEs — latepoint Appointment Booking Plugin…
In the same product, most dangerous first.
CVE-2026-92966CRITICALAppointment Booking Plugin <= 5.7.0 - Unauthenticated Arbitrary Shortcode Execution via First/Last Name FieldEPSS 0.4%CVE-2026-13471MEDIUMLatePoint <= 5.6.3 - Authenticated (Custom+) Insecure Direct Object Reference to Arbitrary Booking Deletion and Customer/Booking Data Disclosure via Abilities REST API (list-bookings, list-customers, delete-booking)EPSS 0.3%CVE-2026-94432MEDIUMAppointment Booking Plugin <= 5.7.1 - Insecure Direct Object Reference to Unauthenticated Unauthorized Transaction Intent Creation/Modification and Invoice Enumeration via 'invoice_id' ParameterEPSS 0.3%CVE-2026-5391MEDIUMLatePoint <= 5.3.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode AttributesEPSS 0.3%CVE-2026-18441MEDIUMLatePoint - Appointment Booking & Scheduling <= 5.6.9 - Unauthenticated Insecure Direct Object Reference to Sensitive Information Disclosure via 'customer[id]' ParameterEPSS 0.2%