CVE-2026-4373
JetFormBuilder — Dynamic Blocks Form Builder に報告された脆弱性
概要
The JetFormBuilder plugin for WordPress is vulnerable to arbitrary file read via path traversal in all versions up to, and including, 3.5.6.2. This is due to the 'Uploaded_File::set_from_array' method accepting user-supplied file paths from the Media Field preset JSON payload without validating that the path belongs to the WordPress uploads directory. Combined with an insufficient same-file check in 'File_Tools::is_same_file' that only compares basenames, this makes it possible for unauthenticated attackers to exfiltrate arbitrary local files as email attachments by submitting a crafted form request when the form is configured with a Media Field and a Send Email action with file attachment.
影響を受けるバージョン
- 0以上 〜 3.5.6.2以下
対処方法
JetFormBuilder — Dynamic Blocks Form Builder を 3.5.6.3 以降に更新してください。これで本脆弱性は解消します。
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30秒で無料診断する参照
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/includes/classes/resources/uploaded-file.php#L99
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/actions-v2/send-email/send-email-action.php#L214
- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.5.6.2/modules/block-parsers/file-uploader.php#L313
- https://plugins.trac.wordpress.org/changeset/3486996/jetformbuilder
- https://www.wordfence.com/threat-intel/vulnerabilities/id/1801fd3e-d56f-4540-9700-9e9de8b465e1?source=cve