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CVE-2026-18316

CRITICAL 9.1 CVSS 3.1
Published
August 16, 2026
Last modified
August 20, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-862
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Description

The Solace Extra plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the import_zip() function in versions up to, and including, 1.6.0. The handler is registered on both wp_ajax_action-import-zip and wp_ajax_nopriv_action-import-zip and only verifies the 'ajax-nonce' nonce, which is emitted on every admin page via wp_localize_script (unrestricted admin_enqueue_scripts hook) and is therefore accessible to any authenticated user including Subscribers. This makes it possible for authenticated attackers, with Subscriber-level access and above, to wipe navigation menus, sidebar widgets (via update_option('sidebars_widgets', array())), all theme mods (via remove_theme_mods()), and Elementor templates, as well as trigger arbitrary demo-content imports.

Affected WordPress components

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

  • solacewp Solace Extra — Up to and including 1.6.0

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/solace-extra/tags/1.6.0/admin/class-solace-extra-admin.php#L289
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/solace-extra/tags/1.6.0/admin/import.php#L2382
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/solace-extra/tags/1.6.0/includes/class-solace-extra.php#L336
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3627961%40solace-extra&new=3627961%40solace-extra
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/4e427c4e-3e27-49e3-ba64-6241b430d5d8?source=cve
  • nvd.nist.gov Official NVD record