# 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.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Aug 2026
- **Updated:** 17 Aug 2026
- **Also known as:** GHSA-xw86-2976-mc83

## 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 (Missing Authorization)

## 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.

## Is CVE-2026-18316 being exploited?

There is no known exploitation of CVE-2026-18316 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18316 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-18316 in the wild and no public exploit code.

Affected product: solacewp Solace Extra. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-18316/ (Markdown: https://insights.sbomify.com/CVE-2026-18316/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18316
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18316
- OSV: https://osv.dev/vulnerability/CVE-2026-18316

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18316/
Summaries are generated and may contain mistakes; the official description above is the record.