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CVE-2026-3367

MEDIUM 4.4 CVSS 3.1
Published
July 11, 2026
Last modified
July 13, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

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.

Affected WordPress components

  • Lockme calendars integration Plugin · lockme-calendars-integration
    Confirmed match Active
    Up to and including 2.11.0
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • lustmored Lockme calendars integration — Up to and including 2.11.0

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L197
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L212
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L223
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L245
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L256
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/tags/2.9.3/src/Plugin.php#L54
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L197
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L212
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L223
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L245
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L256
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/lockme-calendars-integration/trunk/src/Plugin.php#L54
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3495564%40lockme-calendars-integration&new=3495564%40lockme-calendars-integration
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/800b1a44-4173-4b8e-bc69-9a64218e64d6?source=cve
  • nvd.nist.gov Official NVD record