Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More に脆弱性 — CVE-2026-100179
いま何をすべきか
Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More を 5.5.1.4 以降に更新してください。
影響を受けるバージョン
- 5.5.1.3 以下のすべて
対象: プラグイン「Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More」(calculated-fields-form)
何が起きるのか
The Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the 'x (any URL parameter consumed by the form's calculated equation)' parameter in all versions up to, and including, 5.5.1.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the target site to have a public form configured with a Select2-enabled dropdown whose choices are populated via a calculated equation that pipes a URL parameter through GETURLPARAMETER() into setChoices({texts:[...]}); given that configuration, exploitation requires only a single crafted link.
ここから先の選択肢
1. 自分たちで対応する
更新の手順、バックアップの取り方、壊れたときの戻し方をまとめています。
2. いまの制作会社・保守業者に頼む
Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More を使っているかどうかを含めて確認を依頼してください。 無料診断を実行すると、そのまま渡せる依頼文を作れます。
3. 相談先がない・自分では難しい
連絡が取れる相手がいない、管理画面に入れない、侵入された疑いがある。 そうした場合はご相談ください。
出典
- https://plugins.trac.wordpress.org/browser/calculated-fields-form/tags/5.5.1.2/js/fields-public/08_fbuilder.fdropdown.js#L240
- https://plugins.trac.wordpress.org/browser/calculated-fields-form/tags/5.5.1.2/js/fields-public/08_fbuilder.fdropdown.js#L84
- https://plugins.trac.wordpress.org/browser/calculated-fields-form/tags/5.5.1.2/js/modules/08_url/public/01_url.js
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3713574%40calculated-fields-form&new=3713574%40calculated-fields-form
- https://www.wordfence.com/threat-intel/vulnerabilities/id/215a9f92-e922-4fa3-a4ac-83af788f4e55?source=cve