{"id":"CVE-2026-110018","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-110018","generatedAt":"2026-10-28T04:49:34.622Z","title":"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…","description":"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.","published":"2026-10-24T12:16:55.000Z","lastModified":"2026-10-26T18:17:35.000Z","status":"Deferred","sourceIdentifier":"security@wordfence.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-269"],"affected":[],"epss":{"score":0.00387,"percentile":0.32579,"date":"2026-10-27","history":[{"date":"2026-10-25","score":0.00387,"percentile":0.32477}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-24T12:16:55.000Z","detail":{"score":"8.8","severity":"HIGH","publishedAt":"2026-10-24T12:16:54.783Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L345","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L353","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L685","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ablocks/tags/2.16.0/includes/api/form-builder-controller.php#L70","source":"security@wordfence.com"},{"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","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset?reponame=&old=3756864%40ablocks&new=3756864%40ablocks","source":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/6fe7efb5-540b-4d85-852f-ad572da7ecdd?source=cve","source":"security@wordfence.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-110018","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}