# CVE-2026-2440: SurveyJS: Drag & Drop Form Builder <= 2.5.3 - Unauthenticated Stored Cross-Site Scripting

> Unauthenticated attackers can inject malicious scripts via survey submissions that execute in the admin context when results are viewed.

- **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:** 21 Mar 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-v39q-6w5w-5842

## What is CVE-2026-2440?

CVE-2026-2440 is a high-severity cross-site scripting vulnerability in devsoftbaltic SurveyJS: Drag & Drop Form Builder, published on 21 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The SurveyJS plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.5.3 via survey result submissions. This is due to insufficient input sanitization and output escaping. The public survey page exposes the nonce required for submission, allowing unauthenticated attackers to submit HTML-encoded payloads that are decoded and rendered as executable HTML when an administrator views survey results, leading to stored XSS in the admin context.

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

## Which versions are affected by CVE-2026-2440?


## How do I fix CVE-2026-2440?

No fix has been published for CVE-2026-2440 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2440 being exploited?

There is no known exploitation of CVE-2026-2440 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2440 and fix it if it is affected.

What it is: CVE-2026-2440 is a high-severity cross-site scripting vulnerability in devsoftbaltic SurveyJS: Drag & Drop Form Builder, published on 21 Mar 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-2026-2440 in the wild and no public exploit code.

Affected product: devsoftbaltic SurveyJS: 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-2026-2440/ (Markdown: https://insights.sbomify.com/CVE-2026-2440/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2440
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2440
- OSV: https://osv.dev/vulnerability/CVE-2026-2440

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2440/
Summaries are generated and may contain mistakes; the official description above is the record.