CVE-2026-82901: Ultra Addons for Contact Form 7 <= 3.5.50 - Unauthenticated Arbitrary File Upload via Signature Form Field
The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Arbitrary File Upload due to insufficient file type validation in the 'uacf7wpcf7mailcomponents' function in all versions up to, and including, 3.5.50. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: This is only exploitable when the plugin's PDF Generator module is enabled, which is disabled by default.
Affected Software
Event History
Frequently Asked Questions
Is a default installation affected?
Exploitation requires the plugin's PDF Generator module to be enabled. That module is disabled by default, so installations that have not enabled it are not exploitable through this issue.
Does an attacker need an account or user interaction?
No. The vulnerability can be exploited by an unauthenticated attacker and does not require user interaction.
What is the potential impact of successful exploitation?
An attacker may upload arbitrary files to the affected server. This may enable remote code execution, with potential compromise of confidentiality, integrity, and availability.
Which plugin versions are affected?
All versions up to and including 3.5.50 are affected.