Vulnerability · Published Sep 19, 2026 · Assigned by WPScan
CVE-2026-84750Ultimate Addons for Contact Form 7 3.2.4 - 3.5.50 - Unauthenticated Arbitrary File Upload via Signature Field
Medium 6.5
In plain English
A medium-severity unrestricted file upload in Ultra Addons for Contact Form 7 from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Official description
The Ultra Addons for Contact Form 7 WordPress plugin before 3.5.51 does not validate the type or extension of files uploaded through one of its form fields, and stores them at a predictable public path with the attacker-chosen extension intact, allowing unauthenticated users to upload arbitrary files. The PHP handler shipped by default with the Debian and Ubuntu Apache packages maps .phar to PHP alongside .php and .phtml, so on that stack the uploaded file is executed and the issue leads to Remote Code Execution and full site takeover. Where the host routes only .php to the PHP handler, the same file is instead served from the site's own origin with its script intact, leading to Stored Cross-Site Scripting.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Ultra Addons for Contact Form 7 | 3.2.4 – before 3.5.51 |
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
References
- https://wpscan.com/vulnerability/44f68354-4be3-422f-9f94-af980b2ebc44/ exploit, vdb-entry, technical-description