Ninja Forms - File Uploads: arbitrary file upload
Ninja Forms - File Uploads
Arbitrary file upload in the Ninja Forms - File Uploads component. Threat level: High (CVSS 7.5).
Who is affected
This vulnerability affects: Ninja Forms - File Uploads. If you use this component on your site, check the version and update it as soon as possible.
How dangerous
Rating: High, CVSS 7.5 out of 10. It is worth acting before the flaw is exploited.
What this flaw is
Arbitrary file upload lets an attacker place their own file on the server, most often a PHP script (a web shell) that gives them remote control of the site.
It is a short path from a single flaw to a full site takeover and persistent, hidden access.
Score breakdown (CVSS vector)
What the CVSS 7.5 rating means in practice:
- The attack can be carried out remotely, over the internet.
- No login or account required.
- Requires no action from the victim.
- At risk: data confidentiality.
Weakness class: CWE-22.
What to do
- Update the vulnerable component (Ninja Forms - File Uploads) to the latest version.
- If a patch is not out yet, temporarily disable the vulnerable element.
- Check whether the site has already been attacked: unusual files, new administrator accounts, redirects.
- Make a backup before you start making changes.
Does this flaw affect your site?
We will run a free audit: we check versions, plugins, and configuration, and tell you plainly whether you are safe.
Request a free audit →