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Responsive Blocks – Page Builder for Blocks & Patterns Plugin Vulnerability (CVE-2026-6703)

Nick Paliughi
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Security Alert Summary

The Responsive Blocks – Page Builder for Blocks & Patterns plugin for WordPress contains an authorization bypass that affects all versions up to and including 2.2.1. Authenticated users with contributor-level access or higher may be able to modify global plugin configuration options, allowing changes to custom CSS, enabled blocks, layout defaults, and auto-block-recovery behavior.

CVE Details

  • CVE ID: CVE-2026-6703
  • Affected component: Responsive Blocks – Page Builder for Blocks & Patterns plugin for WordPress
  • Affected versions: All versions up to, and including, 2.2.1
  • Published: April 21, 2026 at 7:16:09 AM UTC
  • Last modified: April 21, 2026 at 7:16:09 AM UTC
  • CVSS v3.1: Base Score 4.3 (MEDIUM) — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
  • Authentication / privileges / user interaction: Requires an authenticated user with low privileges (contributor-level access or higher). No user interaction is required.
  • Primary impact: Confidentiality: None; Integrity: Low; Availability: None
  • Weakness: CWE-862 (Missing Authorization)

Technical Details

The vulnerability exists because the plugin does not properly verify that a requesting user is authorized to perform configuration changes. As described in the report, authenticated attackers with contributor-level access and above can modify global, site-wide plugin configuration options.

Specifically, the flaw allows modification of settings such as toggling custom CSS, disabling certain blocks, changing layout defaults (for example, content width, container padding, and container gap), and altering auto-block-recovery behavior. The issue is an authorization check omission rather than a bypass that exposes data; the primary impact is the ability to change configuration and presentation-related settings.

The report references plugin source locations where the missing authorization checks are present; reviewers should examine the plugin’s configuration handling code paths and ensure capability checks are enforced before applying global changes.

How This Could Impact Your Website

Consider a site with several user roles: the site owner, editors who manage content, and external contributors or contractors who submit content. A contributor account is intended for creating and editing their own posts, not for changing site-wide appearance or behavior.

With this vulnerability, a contributor-level account could alter global plugin settings that affect the site’s layout and block availability. Practical consequences include unexpected changes to page layouts, disabled blocks used across the site, or modifications to CSS that affect how content is displayed. Because these changes affect integrity rather than confidentiality, they could be used to present misleading content or alter user-facing interfaces, raising the risk of social engineering or targeted deception.

If you’re unsure whether your site is affected or how to assess your current user roles and plugins, it may be worth having a professional review your setup.

Recommended Actions

  • Update the affected plugin as soon as a patched version is available.
  • Review and reduce unnecessary user roles; restrict contributor capabilities where possible.
  • Enforce strong passwords and enable two-factor authentication for editors and administrators.
  • Remove unused or unmaintained plugins to reduce attack surface.
  • Monitor site activity and plugin configuration changes for unusual behavior or unexpected modifications.

If you’d like help reviewing your plugins, user roles, or overall WordPress security posture, our team at Freshy is happy to help.

References

Nick Paliughihttps://freshysites.com/team/nick-paliughi/
Nick was born in California and now resides in Lake Worth, FL. He has 10 years of experience building and maintaining sites in WordPress, which he is excited to put to use at Freshy. Prior to starting at Freshy in 2022 his focus was on WordPress security & malware removal. When he’s not tending to your website, Nick is installing exhibitions at art galleries and museums in Palm Beach County, and if he’s lucky surfing at the Lake Worth pier.

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