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.
CVE-2021-24884 is a critical severity with CVSS 9.6 Remote Code Execution issue affecting the Plugin Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More. It affects Versions before 4.09.05 and is fixed in 4.09.05.
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CVE-2021-24884 is tracked for the Plugin Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More as critical severity with CVSS 9.6. The affected range is Versions before 4.09.05. Update Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More to 4.09.05 or newer where that version is compatible with the site.
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| Software Type | Plugin |
|---|---|
| Software Slug |
formidable
View on wordpress.org
|
| CVE | CVE-2021-24884 |
| Patched Versions |
4.09.05
|
| Affected Versions |
Versions before 4.09.05
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Formidable Forms <= 6.1.2 - Unauthenticated PHP Object Injection
Formidable Form Builder <= 4.02 - PHP Object Injection
Formidable Form Builder <= 1.07.11 - SQL Injection
Formidable Form Builder < 2.05.03 - Unauthenticated Stored Cross-Site Scripting
Formidable Forms <= 6.28 - Missing Authorization to Unauthenticated Payment Integrity Bypass via PaymentIntent Reuse
Formidable Form Builder <= 5.5.6 - Cross-Site Request Forgery
Formidable Forms <= 6.7 - HTML Injection
Formidable Forms <= 6.3 - Authenticated (Subscriber+) Arbitrary Plugin Installation and Activation
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