Hackers Exploiting Ninja Forms Vulnerability Compromises WordPress Websites

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Critical Vulnerability in Ninja Forms File Uploads Addon Exposes WordPress Sites to Takeover

A recently discovered critical-severity vulnerability in the File Uploads addon for the Ninja Forms WordPress plugin allows attackers to potentially take control of affected sites.

The Flaw:

The flaw, tracked as CVE-2026-0740, has a CVSS score of 9.8 and is categorized as an unauthenticated arbitrary file upload issue.

The Impact:

The vulnerability arises due to a missing file type validation in the function responsible for saving uploaded files to the uploads folder.

According to Defiant, a cybersecurity firm, this oversight enables attackers to upload files with the .php extension, facilitating path traversal and allowing them to upload malicious PHP code to a vulnerable website’s server.

This allows attackers to access the uploaded file to execute remote code execution (RCE), granting them complete control over the targeted site.

Scope of the Issue:

Defiant reports that they have observed thousands of attempts to exploit the vulnerability, affecting approximately 50,000 websites utilizing the affected addon.

Security researcher Sélim Lanouar identified and reported the vulnerability through the Wordfence bug bounty program in January, receiving a $2,145 reward for his efforts.

This highlights the importance of responsible disclosure and collaboration between security researchers and vendors in addressing critical vulnerabilities.

Related News:

In related news, several other significant vulnerabilities have been disclosed in recent weeks, including a critical flaw in the Flowise plugin and a severe vulnerability in the Grafana platform.

These discoveries underscore the need for ongoing vigilance and proactive measures to ensure the security and integrity of online systems.

Conclusion:

Experts emphasize the significance of adopting a comprehensive approach to security, encompassing both technical measures and organizational policies.

As the threat landscape continues to evolve, it is crucial for organizations to stay informed about emerging risks and implement robust strategies to mitigate potential attacks.

The discovery of the Ninja Forms File Uploads vulnerability serves as a reminder of the importance of prioritizing security and staying up-to-date with the latest patches and updates.

By taking proactive steps to address known vulnerabilities, organizations can minimize the risk of successful attacks and protect their online presence.