# CVE-2026-5396: Fluent Forms <= 6.1.21 - Authenticated (Subscriber+) Authorization Bypass via 'form_id' Parameter

> Authenticated attackers can bypass authorization to read, modify, or delete form submissions from unauthorized forms by manipulating the form_id parameter.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 May 2026
- **Updated:** 14 May 2026
- **Also known as:** GHSA-px32-v334-cgrw

## What is CVE-2026-5396?

CVE-2026-5396 is a high-severity missing authorization vulnerability in techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder, published on 14 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Fluent Forms plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to, and including, 6.1.21. This is due to the SubmissionPolicy class authorizing submission-level actions (read, modify, delete, add notes) based on a user-supplied `form_id` query parameter. This makes it possible for authenticated attackers, with Fluent Forms Manager access restricted to specific forms, to read, modify status, add notes to, and permanently delete form submissions belonging to any other form by spoofing the form_id parameter to a form they are authorized for.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-5396?


## How do I fix CVE-2026-5396?

No fix has been published for CVE-2026-5396 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5396 being exploited?

There is no known exploitation of CVE-2026-5396 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5396 and fix it if it is affected.

What it is: CVE-2026-5396 is a high-severity missing authorization vulnerability in techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder, published on 14 May 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-2026-5396 in the wild and no public exploit code.

Affected product: techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational 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-2026-5396/ (Markdown: https://insights.sbomify.com/CVE-2026-5396/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5396
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5396
- OSV: https://osv.dev/vulnerability/CVE-2026-5396

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-5396/
Summaries are generated and may contain mistakes; the official description above is the record.