# CVE-2026-17609: Super Forms <= 6.3.316 - Unauthenticated Arbitrary Directory Deletion via 'data[...][files][][subdir]' Parameter

> Unauthenticated attackers can delete arbitrary directories, including the WordPress root, if the file deletion setting is enabled.

- **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:** 8 Oct 2026
- **Updated:** 10 Oct 2026
- **Also known as:** GHSA-pchj-gc42-gqq7

## What is CVE-2026-17609?

CVE-2026-17609 is a critical path traversal vulnerability in WebRehab Super Forms – Drag & Drop Form Builder, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Super Forms – Drag & Drop Form Builder plugin for WordPress is vulnerable to Arbitrary Directory Deletion in all versions up to, and including, 6.3.316 via the submit_form function. This is due to insufficient validation of attacker-controlled JSON field declarations against the actual form schema, combined with a non-effective ABSPATH guard that dirname() trivially bypasses by stripping the trailing slash. This makes it possible for unauthenticated attackers to recursively delete arbitrary directories on the server, including the WordPress root directory. Exploitation requires that an administrator has enabled the 'Delete files from server after form submissions' setting, though this is a documented and commonly-enabled feature.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2026-17609?


## How do I fix CVE-2026-17609?

No fix has been published for CVE-2026-17609 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-17609 being exploited?

There is no known exploitation of CVE-2026-17609 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-17609 and fix it if it is affected.

What it is: CVE-2026-17609 is a critical path traversal vulnerability in WebRehab Super Forms – Drag & Drop Form Builder, published on 8 Oct 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-2026-17609 in the wild and no public exploit code.

Affected product: WebRehab Super Forms – Drag & Drop Form Builder. 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-2026-17609/ (Markdown: https://insights.sbomify.com/CVE-2026-17609/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-17609
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-17609
- OSV: https://osv.dev/vulnerability/CVE-2026-17609

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-17609/
Summaries are generated and may contain mistakes; the official description above is the record.