# CVE-2026-82901 — themefic Ultra Addons for Contact Form 7

> As of 2026-09-26, CVE-2026-82901 is a CRITICAL-severity vulnerability in themefic Ultra Addons for Contact Form 7, CVSS v3.1 9.8, EPSS 1.1% (64.5th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-82901 as of 2026-09-26; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-26

## What is CVE-2026-82901?

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Arbitrary File Upload due to insufficient file type validation in the 'uacf7_wpcf7_mail_components' 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.

The record classifies CVE-2026-82901 under weakness class [CWE-434](https://intel.threadlinqs.com/cwe/CWE-434). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 9 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 1.1% probability of exploitation in the next 30 days, higher than 64.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 9.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-26

## Is CVE-2026-82901 being exploited?

Weaponised exploit code for CVE-2026-82901 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 54 in the Threadlinqs vulnerability feed.

- [murrez/CVE-2026-82901](https://github.com/murrez/CVE-2026-82901) (github)

## Affected products and versions

- **themefic**: Ultra Addons for Contact Form 7

## How to fix CVE-2026-82901

No vendor patch reference has been recorded for CVE-2026-82901 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-82901

No threat campaign in the Threadlinqs corpus currently references CVE-2026-82901, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-28.

**Other references**

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

_Showing 5 of 7 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-82901
Full detection coverage and IOCs for threats exploiting CVE-2026-82901 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp