CVE-2026-18316 json
Solace Extra <= 1.6.0 - Missing Authorization to Unauthenticated Site Content Deletion and Unauthorized Demo Import via action-import-zip AJAX Action
published 2026-08-16 2 mo ago modified 2026-08-20 2 mo ago also EUVD-2026-59897
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Affected products
- solacewp Solace Extra
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/4e427c4e-3e27-49e3-ba64-6241b430d5d8?source=cve
- plugins.trac.wordpress.org /browser/solace-extra/tags/1.6.0/admin/import.php#L2382
- plugins.trac.wordpress.org /browser/solace-extra/tags/1.6.0/includes/class-solace-extra.php#L336
- plugins.trac.wordpress.org /browser/solace-extra/tags/1.6.0/admin/class-solace-extra-admin.php#L289
- plugins.trac.wordpress.org /changeset?reponame=&old=3627961%40solace-extra&new=3627961%40solace-extra
Sources
- CVE List CVE-2026-18316
- NVD CVE-2026-18316
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.