# CVE-2026-8939: Search Simple Fields <= 0.2 - Cross-Site Request Forgery to Plugin Settings Update

> Attackers can trick administrators into modifying Search Simple Fields plugin settings via forged requests, requiring a patch to fix missing nonce validation.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 May 2026
- **Updated:** 27 May 2026
- **Also known as:** GHSA-3jqv-9jvm-w5m3

## What is CVE-2026-8939?

CVE-2026-8939 is a medium-severity vulnerability in simonailie Search Simple Fields, published on 27 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The Search Simple Fields plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 0.2. This is due to missing or incorrect nonce validation on the search_simple_fields_options() function in functions_admin.php. This makes it possible for unauthenticated attackers to modify the plugin's settings — including post types to search in, custom fields, media fields and the custom media function name — via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-8939?


## How do I fix CVE-2026-8939?

No fix has been published for CVE-2026-8939 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8939 being exploited?

There is no known exploitation of CVE-2026-8939 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8939 and fix it if it is affected.

What it is: CVE-2026-8939 is a medium-severity vulnerability in simonailie Search Simple Fields, published on 27 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-8939 in the wild and no public exploit code.

Affected product: simonailie Search Simple Fields. 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-2026-8939/ (Markdown: https://insights.sbomify.com/CVE-2026-8939/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8939
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8939
- OSV: https://osv.dev/vulnerability/CVE-2026-8939

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8939/
Summaries are generated and may contain mistakes; the official description above is the record.