# CVE-2026-87870: Cross-site scripting in Ninja Forms - Scheduled Exports

> Authenticated attackers can inject arbitrary scripts via REST API parameters in the Ninja Forms Scheduled Exports plugin, leading to stored XSS.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/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:** 10 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** GHSA-vxhj-7whr-2q55

## What is CVE-2026-87870?

CVE-2026-87870 is a medium-severity cross-site scripting vulnerability in Saturday Drive Ninja Forms - Scheduled Exports, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Ninja Forms - Scheduled Exports plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REST API Parameters (interval, format, emailTo) in all versions up to, and including, 3.0.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level privileges and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The REST endpoint is registered without a permission_callback and only validates a nonce without checking user capabilities.

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

## Which versions are affected by CVE-2026-87870?


## How do I fix CVE-2026-87870?

No fix has been published for CVE-2026-87870 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-87870 being exploited?

There is no known exploitation of CVE-2026-87870 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-87870 and fix it if it is affected.

What it is: CVE-2026-87870 is a medium-severity cross-site scripting vulnerability in Saturday Drive Ninja Forms - Scheduled Exports, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-87870 in the wild and no public exploit code.

Affected product: Saturday Drive Ninja Forms - Scheduled Exports. 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-2026-87870/ (Markdown: https://insights.sbomify.com/CVE-2026-87870/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-87870
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-87870
- OSV: https://osv.dev/vulnerability/CVE-2026-87870

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-87870/
Summaries are generated and may contain mistakes; the official description above is the record.