Lockme OAuth2 calendars integration <= 2.11.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'App ID' Setting

Wordfence Intelligence   >   Vulnerability Database   >   Lockme OAuth2 calendars integration <= 2.11.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'App ID' Setting
4.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2026-3367
CVSS 4.4 (Medium)
Publicly Published July 10, 2026
Last Updated July 11, 2026
Researcher Muhammad Nur Ibnu Hubab - Pondok Teknologi

Description

The Lockme OAuth2 calendars integration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'App ID' setting in all versions up to, and including, 2.11.0. This is due to insufficient input sanitization and output escaping. The register_setting() call on line 197 lacks a sanitize callback, allowing unsanitized data to be stored via update_option(). When the settings page is rendered, the stored value is echoed directly into an HTML input's value attribute without esc_attr() on line 212. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in the settings page that will execute whenever a user accesses the plugin settings page. Multiple fields are affected: App ID (client_id), App Secret (client_secret), Bookings ID prefix (id_prefix), and API domain (api_domain). This vulnerability is particularly impactful in WordPress multisite installations where administrators of individual sites should not be able to execute JavaScript affecting other users.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for Lockme calendars integration

Lockme calendars integration

Software Type Plugin
Software Slug lockme-calendars-integration (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.11.1, or a newer patched version
Affected Version
  • <= 2.11.0
Patched Version
  • 2.11.1

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