# CVE-2021-24164: Ninja Forms < 3.4.34.1 - Authenticated OAuth Connection Key Disclosure

> Low-privilege users can retrieve OAuth connection URLs and client IDs, exposing sensitive authentication data.

- **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:** 5 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-2mcw-g4r6-c9vv

## What is CVE-2021-24164?

CVE-2021-24164 is a medium-severity vulnerability in Ninjaforms Ninja Forms, published on 5 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In the Ninja Forms Contact Form WordPress plugin before 3.4.34.1, low-level users, such as subscribers, were able to trigger the action, wp_ajax_nf_oauth, and retrieve the connection url needed to establish a connection. They could also retrieve the client_id for an already established OAuth connection.

Weakness: CWE-862 (Missing Authorization), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2021-24164?

It affects 1 product.


Products: Ninjaforms Ninja Forms.

## How do I fix CVE-2021-24164?

No fix has been published for CVE-2021-24164 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24164 being exploited?

There is no known exploitation of CVE-2021-24164 in the wild and no public exploit code.

## Other vulnerabilities in Ninjaforms Ninja Forms

- [CVE-2025-9083](https://insights.sbomify.com/CVE-2025-9083/): Ninja-forms < 3.11.1 - Unauthenticated PHP Objection (critical 9.8)
- [CVE-2016-1209](https://insights.sbomify.com/CVE-2016-1209/): Deserialization in n/a (critical 9.8)
- [CVE-2018-20981](https://insights.sbomify.com/CVE-2018-20981/): Information disclosure in n/a (critical 9.1)
- [CVE-2024-25572](https://insights.sbomify.com/CVE-2024-25572/): Cross-site request forgery in Ninja Forms (high 8.8)
- [CVE-2021-24163](https://insights.sbomify.com/CVE-2021-24163/): Ninja Forms < 3.4.34 - Authenticated SendWP Plugin Installation and Client Secret Key Disclosure (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24164 and fix it if it is affected.

What it is: CVE-2021-24164 is a medium-severity vulnerability in Ninjaforms Ninja Forms, published on 5 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-24164 in the wild and no public exploit code.

Affected product: Ninjaforms Ninja Forms. 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-2021-24164/ (Markdown: https://insights.sbomify.com/CVE-2021-24164/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24164
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24164
- OSV: https://osv.dev/vulnerability/CVE-2021-24164

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24164/
Summaries are generated and may contain mistakes; the official description above is the record.