CVE-2026-110018 (GCVE-0-2026-110018)

Vulnerability from cvelistv5 – Published: 2026-10-24 11:30 – Updated: 2026-10-24 11:30
VLAI
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-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.
CWE
  • CWE-269 - Improper Privilege Management
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2251 records in the last 180 days details
Impacted products
Show details on NVD website

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          "vendor": "kodezen",
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          "url": "https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L353"
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          "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"
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          "time": "2026-10-21T15:41:41.000Z",
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          "time": "2026-10-23T21:31:29.000Z",
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      "title": "aBlocks \u003c= 2.17.0 - Authenticated (Contributor+) Privilege Escalation to \u0027roleSlug\u0027 Block Attribute"
    }
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  "cveMetadata": {
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    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-110018",
    "datePublished": "2026-10-24T11:30:30.545Z",
    "dateReserved": "2026-10-13T14:56:35.053Z",
    "dateUpdated": "2026-10-24T11:30:30.545Z",
    "state": "PUBLISHED"
  },
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                "vendor": "kodezen",
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                    "version": "0",
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          }
        ],
        "id": "CVE-2026-110018",
        "lastModified": "2026-10-24T12:16:54.783",
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                "confidentialityImpact": "HIGH",
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        "vulnStatus": "Received",
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}



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