CVE-2022-47594

Essential Blocks for Gutenberg <= 3.8.5 - Cross-Site Request Forgery

2023-01-20 00:00
Lucio Sá

Strategic Overview

Status
Patched in 3.8.6
Affected Plugin
Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
Affected Version
<= 3.8.5
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2022-47594
View all Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns vulnerabilities

At a glance

CVE-2022-47594 is a medium-severity Missing Authorization vulnerability in the Gutenberg Essential Blocks WordPress plugin, affecting versions <= 3.8.5. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.8.6; sites on affected versions should update now. Disclosed January 2023, reported by Lucio Sá.

Vulnerability Overview

The Essential Blocks for Gutenberg plugin for WordPress is vulnerable to authorization bypass due to incorrectly defined capability checks throughout the 'EB_Openverse_Ajax' class in versions up to, and including, 3.8.5. This makes it possible for unauthenticated attackers to register Openverse clients, upload images, and perform other Openverse actions via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.  

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-862: Missing Authorization

Gutenberg Essential Blocks <= 3.8.5 carries this weakness at EB_Openverse_Ajax, and reaching it takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Gutenberg Essential Blocks the fix is 3.8.6: builds <= 3.8.5 are affected, anything from 3.8.6 onward is not.

Remediation

Update to version 3.8.6, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Gutenberg Essential Blocks 3.8.6 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-47594https://www.wordfence.com/threat-intel/vulnerabilities/id/1ddfd5d9-a7e4-42a8-8419-9a35b4781d3chttps://nvd.nist.gov/vuln/detail/CVE-2022-47594

Related records

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