# CVE-2026-6703: Missing authorization in Responsive Blocks – Page Builder for Blocks & Patterns

> Authenticated contributors can modify global site-wide plugin configuration options due to missing authorization checks in the Responsive Blocks WordPress plugin.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 21 Apr 2026
- **Also known as:** GHSA-47x2-3wfg-624p

## What is CVE-2026-6703?

CVE-2026-6703 is a medium-severity missing authorization vulnerability in cyberchimps Responsive Blocks – Page Builder for Blocks & Patterns, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Responsive Blocks – Page Builder for Blocks & Patterns plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 2.2.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to modify global site-wide plugin configuration options, including toggling custom CSS, disabling blocks, changing layout defaults such as content width, container padding, and container gap, and altering auto-block-recovery behavior.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-6703?


## How do I fix CVE-2026-6703?

No fix has been published for CVE-2026-6703 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6703 being exploited?

There is no known exploitation of CVE-2026-6703 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6703 and fix it if it is affected.

What it is: CVE-2026-6703 is a medium-severity missing authorization vulnerability in cyberchimps Responsive Blocks – Page Builder for Blocks & Patterns, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6703 in the wild and no public exploit code.

Affected product: cyberchimps Responsive Blocks – Page Builder for Blocks & Patterns. 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-2026-6703/ (Markdown: https://insights.sbomify.com/CVE-2026-6703/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6703
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6703
- OSV: https://osv.dev/vulnerability/CVE-2026-6703

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-6703/
Summaries are generated and may contain mistakes; the official description above is the record.