---
title: "CVE-2026-82901: Ultra Addons for Contact Form 7 - Arbitrary File Upload"
description: "Ultra Addons for Contact Form 7 WordPress plugin <= 3.5.50 contains an arbitrary file upload vulnerability caused by insufficient file type validation in 'uacf7_wpcf7_mail_components', letting unauthenticated attackers upload arbitrary files, exploit requires PDF Generator module enabled."
url: https://panop.io/threat-heartbeat/CVE-2026-82901/
---

# CVE-2026-82901 Ultra Addons for Contact Form 7 - Arbitrary File Upload

Ultra Addons for Contact Form 7 WordPress plugin <= 3.5.50 contains an arbitrary file upload vulnerability caused by insufficient file type validation in 'uacf7\_wpcf7\_mail\_components', letting unauthenticated attackers upload arbitrary files, exploit requires PDF Generator module enabled.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

Proof of concept available

EPSS

1.11% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-82901)

## Details

Type

Arbitrary File Upload

Impact

Remote Code Execution, File System Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

26 September 2026

Updated

15 October 2026

Weakness

[CWE-434](https://cwe.mitre.org/data/definitions/434.html)

## Vendor fix

Update to the latest version where this issue is fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-82901](https://nvd.nist.gov/vuln/detail/CVE-2026-82901)
- [https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/signature/ultimate-signature.php#L133](https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/signature/ultimate-signature.php#L133)
- [https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/signature/ultimate-signature.php#L192](https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/signature/ultimate-signature.php#L192)
- [https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/signature/ultimate-signature.php#L300](https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/signature/ultimate-signature.php#L300)
- [https://plugins.trac.wordpress.org/changeset/3698232/ultimate-addons-for-contact-form-7](https://plugins.trac.wordpress.org/changeset/3698232/ultimate-addons-for-contact-form-7)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/872e1a05-aacc-44fa-93c1-8c3f7b2fb46d?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/872e1a05-aacc-44fa-93c1-8c3f7b2fb46d?source=cve)
- [https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/pdf-generator/pdf-generator.php#L608](https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/pdf-generator/pdf-generator.php#L608)
- [https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/pdf-generator/pdf-generator.php#L807](https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.48/addons/pdf-generator/pdf-generator.php#L807)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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