# CVE-2026-19769: Cross-site scripting in Ninja Forms – The Contact Form Builder That Grows With You

> Unauthenticated attackers can inject arbitrary scripts via stored XSS in Ninja Forms, requiring the File Uploads add-on to be active.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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:** 5 Sep 2026
- **Updated:** 8 Sep 2026
- **Also known as:** GHSA-4g6m-8fw6-3c27

## What is CVE-2026-19769?

CVE-2026-19769 is a high-severity cross-site scripting vulnerability in kstover Ninja Forms – The Contact Form Builder That Grows With You, published on 5 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key in all versions up to, and including, 3.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Ninja Forms File Uploads add-on to be active, as the attack routes the unwhitelisted child entry through the File Uploads handler to write an attacker-supplied HTML file containing arbitrary JavaScript into any web-server-writable directory, including the site root, where it is served from the site's own origin.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-19769?


## How do I fix CVE-2026-19769?

No fix has been published for CVE-2026-19769 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19769 being exploited?

There is no known exploitation of CVE-2026-19769 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19769 and fix it if it is affected.

What it is: CVE-2026-19769 is a high-severity cross-site scripting vulnerability in kstover Ninja Forms – The Contact Form Builder That Grows With You, published on 5 Sep 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-2026-19769 in the wild and no public exploit code.

Affected product: kstover Ninja Forms – The Contact Form Builder That Grows With You. 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-2026-19769/ (Markdown: https://insights.sbomify.com/CVE-2026-19769/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19769
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19769
- OSV: https://osv.dev/vulnerability/CVE-2026-19769

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-19769/
Summaries are generated and may contain mistakes; the official description above is the record.