CVE-2026-18441: CWE-639 Authorization Bypass Through User-Controlled Key in latepoint Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress
The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.9 via the set_customer_object due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate arbitrary customer records and disclose personally identifiable information - including first name, last name, email address, and phone number - by iterating the customer[id] parameter. This issue is exploitable only when the site is configured with customer authentication disabled (guest checkout enabled).
AI Analysis
Technical Summary
CVE-2026-18441 describes an authorization bypass vulnerability (CWE-639) in the LatePoint Appointment Booking Plugin for WordPress. The flaw exists in the set_customer_object functionality where the customer[id] parameter is not properly validated, enabling unauthenticated attackers to enumerate customer records. This leads to disclosure of personally identifiable information. The issue affects all versions up to and including 5.6.9 and is exploitable only if guest checkout is enabled, disabling customer authentication.
Potential Impact
An attacker can enumerate arbitrary customer records without authentication, disclosing personally identifiable information including first name, last name, email address, and phone number. This exposure can lead to privacy violations and potential misuse of customer data. There is no indication of integrity or availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, sites should ensure customer authentication is enabled (disable guest checkout) to prevent exploitation. Monitor for vendor updates regarding an official patch.
CVE-2026-18441: CWE-639 Authorization Bypass Through User-Controlled Key in latepoint Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress
Description
The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.9 via the set_customer_object due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate arbitrary customer records and disclose personally identifiable information - including first name, last name, email address, and phone number - by iterating the customer[id] parameter. This issue is exploitable only when the site is configured with customer authentication disabled (guest checkout enabled).
CVSS v3.1
Score 4.3medium
Affected software
latepoint
Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18441 describes an authorization bypass vulnerability (CWE-639) in the LatePoint Appointment Booking Plugin for WordPress. The flaw exists in the set_customer_object functionality where the customer[id] parameter is not properly validated, enabling unauthenticated attackers to enumerate customer records. This leads to disclosure of personally identifiable information. The issue affects all versions up to and including 5.6.9 and is exploitable only if guest checkout is enabled, disabling customer authentication.
Potential Impact
An attacker can enumerate arbitrary customer records without authentication, disclosing personally identifiable information including first name, last name, email address, and phone number. This exposure can lead to privacy violations and potential misuse of customer data. There is no indication of integrity or availability impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, sites should ensure customer authentication is enabled (disable guest checkout) to prevent exploitation. Monitor for vendor updates regarding an official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-30T20:33:41.814Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aac788555bf5e2cf5129610
Added to database: 09/17/2026, 23:32:21 UTC
Last enriched: 09/17/2026, 23:46:58 UTC
Last updated: 09/18/2026, 03:20:23 UTC
Views: 8
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