---
id: CVE-2026-110018
title: >-
  aBlocks <= 2.17.0 - Authenticated (Contributor+) Privilege Escalation to
  'roleSlug' Block Attribute
summary: >-
  The aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form
  Builder & Animation Builder plugin for WordPress is vulnerable to Privilege
  Escalation in all versions up to, and including, 2.17.0 via the
  `/ablocks/v1/form-bui…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-269
vendor: kodezen
product: >-
  aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form
  Builder & Animation Builder
affected:
  - >-
    ablocks_gutenberg_blocks_user_dashboard_builder_popup_builder_form_builder_animation_builder
    <= 2.17.0
published: '2026-10-24'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T11:30:30.545Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-110018'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/6fe7efb5-540b-4d85-852f-ad572da7ecdd?source=cve
  - url: >-
      https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L353
  - url: >-
      https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L70
  - url: >-
      https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L345
  - url: >-
      https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/blocks/form-builder/block-attr-sanitizer/sanitizers/form-builder/registration-form-sanitizer.php#L28
  - url: >-
      https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L685
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3756864%40ablocks&new=3756864%40ablocks
tags:
  - cve.org
ingestedAt: '2026-10-24T11:57:47.031Z'
---

## Overview

The aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.17.0 via the `/ablocks/v1/form-builder/registration` REST endpoint. The vulnerability exists because the endpoint is registered with `permission_callback => __return_true` and the `register()` handler reads `roleSlug` directly from attacker-controlled block attributes in `post_content` without ever verifying that the block's `formType` is `registration` — a condition that `RegistrationFormSanitizer::verify()` imposes only at save-time, meaning a Contributor can preserve an arbitrary `roleSlug` by saving a block with `formType='login'` and then triggering the endpoint via a valid `wp_rest` nonce and post-ownership check. This makes it possible for authenticated attackers, with Contributor-level access and above, to escalate their WordPress role to Editor or any other non-administrator role and receive a fully authenticated session at the elevated privilege level via `WP_User::set_role()` and `wp_set_auth_cookie()`. Escalation is bounded below administrator-tier roles because `is_safe_registration_role()` rejects any role holding `manage_options`, `edit_users`, `delete_users`, `create_users`, `promote_users`, or `edit_theme_options`, meaning the highest practically reachable role on a standard WordPress installation is Editor.

## Affected

- `ablocks_gutenberg_blocks_user_dashboard_builder_popup_builder_form_builder_animation_builder <= 2.17.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.