# CVE-2026-18347: Missing authorization in Kirki – Freeform Page Builder, Website Builder & Customizer

> Authenticated attackers can read sensitive user metadata and records of any user, including administrators, via the frontend collection endpoint.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Aug 2026
- **Updated:** 17 Aug 2026
- **Also known as:** GHSA-mp8r-x8v9-xf3q

## What is CVE-2026-18347?

CVE-2026-18347 is a medium-severity missing authorization vulnerability in themeum Kirki – Freeform Page Builder, Website Builder & Customizer, published on 16 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 6.1.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to read arbitrary user metadata and sensitive user record fields — including email address, assigned roles, registration date, and any user_meta values — belonging to any WordPress user including administrators, by supplying a target user ID with a user-type context to the frontend collection endpoint.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-18347?


## How do I fix CVE-2026-18347?

No fix has been published for CVE-2026-18347 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18347 being exploited?

There is no known exploitation of CVE-2026-18347 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18347 and fix it if it is affected.

What it is: CVE-2026-18347 is a medium-severity missing authorization vulnerability in themeum Kirki – Freeform Page Builder, Website Builder & Customizer, published on 16 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18347 in the wild and no public exploit code.

Affected product: themeum Kirki – Freeform Page Builder, Website Builder & Customizer. 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-2026-18347/ (Markdown: https://insights.sbomify.com/CVE-2026-18347/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18347
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18347
- OSV: https://osv.dev/vulnerability/CVE-2026-18347

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-18347/
Summaries are generated and may contain mistakes; the official description above is the record.