Arbitrary File Upload Vulnerability in Ultra Addons for Contact Form 7 Plugin by WordPress
CVE-2026-82901

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Ultra Addons For Contact Form 7
Vendor
CVE Published:
26 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82901?

The Ultra Addons for Contact Form 7 plugin for WordPress contains a vulnerability that allows unauthorized file uploads due to inadequate validation of file types in the 'uacf7_wpcf7_mail_components' function. This weakness affects all versions up to and including 3.5.50. When exploited, particularly with the PDF Generator module enabled (although disabled by default), attackers could potentially upload arbitrary files, which may lead to remote code execution on the server hosting the affected site.

Affected Version(s)

Ultra Addons for Contact Form 7 0 <= 3.5.50

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82901
Created by murrez

CVE-2026-82901
Created by tonydelouvre

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/ultimate-addon...
https://plugins.trac.wordpress.org/browser/ultimate-addon...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Supakiad S. (m3ez)
.