CVE-2026-120522 - Critical Vulnerability in Cloud Storage Manager for Fluent Forms

Introduction

The vulnerability CVE-2026-120522 affects the Cloud Storage Manager for Fluent Forms plugin in WordPress, allowing arbitrary file writes. This flaw is considered critical and can have severe consequences for users of the plugin.

What happened?

It was identified that the Cloud Storage Manager for Fluent Forms plugin has missing authorization checks on the REST endpoints `connection/{driver}/save` and `/download/single-file`. Additionally, the `downloadFile()` function does not properly validate paths, allowing unauthenticated attackers to store attacker-controlled credentials and trigger downloads of malicious files.

How the vulnerability works

The vulnerability arises from a lack of path validation and authorization checks, allowing an attacker to write content outside the intended directory. When a PHP file is written to a web-accessible location, it can lead to remote code execution, compromising server security.

What is the real impact?

The impact of this vulnerability is significant, as it can allow an attacker to execute arbitrary code on the server, potentially compromising the entire WordPress installation. Users of the plugin are at risk, especially if the malicious file is executed.

Which versions are affected?

• Up to 1.2.0

How to fix

1. Check the version of the Cloud Storage Manager plugin you are using.
2. Update the plugin to the latest version as soon as a fix is available.
3. Consider disabling the plugin until a secure update is released.
4. Monitor the official channels of the plugin for updates and security fixes.

Mitigation while waiting to update

While it is not possible to update, it is recommended to disable the plugin to prevent any exploitation of the vulnerability. Additionally, reviewing file and directory access permissions on the server is advisable to minimize risks.

Conclusion

The CVE-2026-120522 vulnerability poses a critical risk to users of the Cloud Storage Manager for Fluent Forms. It is essential for system administrators to take immediate action to protect their installations.