Formidable Form Builder <= 5.5.4 - Cross-Site Request Forgery
Strategic Overview
- Status
- Patched in 5.5.5
- Affected Plugin
- Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More
- Affected Version
<= 5.5.4- CVSS
- 5.4Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2022-45806
At a glance
CVE-2022-45806 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Formidable Forms WordPress plugin, affecting versions <= 5.5.4. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 5.5.5; sites on affected versions should update now. Disclosed December 2022, reported by István Márton.
Vulnerability Overview
The Formidable Form Builder plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 5.5.4. This is due to missing or incorrect nonce validation on two functions handling migrations and data loading. This makes it possible for unauthenticated attackers to invoke those functions, via forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-352: Cross-Site Request Forgery (CSRF)
Reaching this weakness in Formidable Forms <= 5.5.4 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.
An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Formidable Forms the fix is 5.5.5: builds <= 5.5.4 are affected, anything from 5.5.5 onward is not.
Remediation
Update to version 5.5.5, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Formidable Forms: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Formidable Forms 5.5.5 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More
- 9.8CVE-2023-1405: Formidable Forms <= 6.1.2 PHP Object Injection
CVE-2023-1405 - 9.8CVE-2019-15780: Formidable Form Builder <= 4.02 PHP Object Injection
CVE-2019-15780 - 9.6CVE-2021-24884: Formidable Form Builder <= 4.09.04 Stored XSS
CVE-2021-24884 - 9.1Formidable Form Builder <= 2.0.21 Missing Authorization Checks
- 8.8CVE-2014-9309: Formidable Form Builder <= 1.07.11 SQL Injection
CVE-2014-9309 - 8.6Formidable Form Builder < 2.05.03 SQL Injection
- 8.3CVE-2017-20192: Formidable Form Builder < 2.05.03 Stored XSS
CVE-2017-20192 - 7.5CVE-2026-2890: Formidable… Unauthenticated Payment Integrity Bypass
CVE-2026-2890
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