CVE-2026-12113

Appointment Booking Calendar <= 1.4.02 - Missing Authorization to Authenticated (Contributor+) Sensitive Information Disclosure

2026-06-30 16:22
Wordfence PRISM

Strategic Overview

Status
Patched in 1.4.03
Affected Plugin
Appointment Booking Calendar
Affected Version
<= 1.4.02
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-12113
View all Appointment Booking Calendar vulnerabilities

At a glance

CVE-2026-12113 is a medium-severity Missing Authorization vulnerability in the Appointment Booking Calendar WordPress plugin, affecting versions <= 1.4.02. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 1.4.03; sites on affected versions should update now. Disclosed June 2026, reported by Wordfence PRISM.

Vulnerability Overview

The Appointment Booking Calendar plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.4.02 via the cpabc_appointments_filter_list. This makes it possible for authenticated attackers, with contributor-level access and above, to extract customer names, email addresses, phone numbers, appointment comments, and other booking personally identifiable information.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Appointment Booking Calendar <= 1.4.02 takes an account at Contributor level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Appointment Booking Calendar the fix is 1.4.03: builds <= 1.4.02 are affected, anything from 1.4.03 onward is not.

Remediation

Update to version 1.4.03, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Appointment Booking Calendar 1.4.03 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-12113https://www.wordfence.com/threat-intel/vulnerabilities/id/3838bb64-fd85-43a4-97a2-7ca7930697adhttps://nvd.nist.gov/vuln/detail/CVE-2026-12113

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C