CVE-2021-24884

The Formidable Form Builder WordPress plugin before 4.09.05 allows to inject certain HTML Tags like <audio>,<video>,<img>,<a> and<button>.This could allow an unauthenticated, remote attacker to exploit a HTML-injection byinjecting a malicous link. The HTML-injection may trick authenticated users to follow the link. If the Link gets clicked, Javascript code can be executed. The vulnerability is due to insufficient sanitization of the "data-frmverify" tag for links in the web-based entry inspection page of affected systems. A successful exploitation incomibantion with CSRF could allow the attacker to perform arbitrary actions on an affected system with the privileges of the user. These actions include stealing the users account by changing their password or allowing attackers to submit their own code through an authenticated user resulting in Remote Code Execution. If an authenticated user who is able to edit Wordpress PHP Code in any kind, clicks the malicious link, PHP code can be edited.

CWE: CWE-79, CWE-352 ／ 公開 2021年10月25日 ／ 最終更新 2026年6月17日

Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More を 4.09.05 以降に更新してください。これで本脆弱性は解消します。

この脆弱性は実証コードが公開されています。攻撃に利用されやすい状態のため、優先して対応してください。

Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More の他の脆弱性を見る →