CVE-2026-18316 Missing authorization in Solace Extra
Authenticated attackers can delete site content and import demo data due to missing capability checks in the Solace Extra WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18316?
CVE-2026-18316 is a critical missing authorization vulnerability in solacewp Solace Extra, published on 16 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-18316?
How do I fix CVE-2026-18316?
No fix has been published for CVE-2026-18316 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18316 being exploited?
There is no known exploitation of CVE-2026-18316 in the wild and no public exploit code.
Sources
Also known as GHSA-xw86-2976-mc83.