solacewp Solace Extra Plugin up to 1.6.0 on WordPress import_zip improper authorization

Summaryinfo

A vulnerability described as problematic has been identified in solacewp Solace Extra Plugin up to 1.6.0. This affects the function import_zip. Executing a manipulation can lead to improper authorization. This vulnerability is tracked as CVE-2026-18316. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in solacewp Solace Extra Plugin up to 1.6.0. It has been declared as problematic. This vulnerability affects the function import_zip. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect integrity, and availability. CVE summarizes:

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.

The advisory is available at wordfence.com. This vulnerability was named CVE-2026-18316 since 07/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/16/2026). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• solacewp

Name

• Solace Extra Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6.0

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CPE 2.2info

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