CVE-2026-18316
Received Received - Intake

Unauthorized Data Modification in Solace Extra WordPress Plugin

Publication date: 2026-08-16

Last updated on: 2026-08-16

Assigner: Wordfence

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.

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Meta Information

Published
2026-08-16
Last Modified
2026-08-16
Generated
2026-08-16
AI Q&A
2026-08-16
EPSS Evaluated
N/A
NVD
CVE-2026-18316
EUVD
EUVD-2026-59897

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
solace extra to 1.6.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

The Solace Extra WordPress plugin up to version 1.6.0 has a vulnerability where an attacker with Subscriber-level access or higher can exploit a missing capability check in the import_zip() function. This allows them to modify or delete critical site data, including navigation menus, widgets, theme settings, and templates, by sending malicious requests.

Detection Guidance

Check WordPress installations for the Solace Extra plugin version 1.6.0 or lower. Look for unauthorized changes in navigation menus, widgets, theme mods, or Elementor templates. Review server logs for suspicious AJAX requests to wp_ajax_action-import-zip or wp_ajax_nopriv_action-import-zip.

Impact Analysis

An attacker could wipe your site's navigation menus, remove sidebar widgets, delete theme customizations, or import arbitrary demo content. This could disrupt your website's functionality and require manual restoration of lost data.

Mitigation Strategies

Update the Solace Extra plugin to the latest version. Remove or disable the plugin if no update is available. Restrict user roles to prevent Subscriber-level access. Monitor for unauthorized changes in theme files and database options.

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