Nex Forms – Ultimate Form Builder – Lite: arbitrary file deletion
Nex Forms – Ultimate Form Builder – Lite
Arbitrary file deletion in the Nex Forms – Ultimate Form Builder – Lite component. Threat level: High (CVSS 8.1).
Who is affected
This vulnerability affects: Nex Forms – Ultimate Form Builder – Lite. If you use this component on your site, check the version and update it as soon as possible.
How dangerous
Rating: High, CVSS 8.1 out of 10. It is worth acting before the flaw is exploited.
What this flaw is
The flaw allows deletion of files the attacker should not be able to touch. In WordPress, deleting the right file is sometimes used to bypass install-time protections.
It can lead to a site outage and, in the right conditions, to a takeover through a repeated, controlled reinstall.
Score breakdown (CVSS vector)
What the CVSS 8.1 rating means in practice:
- The attack can be carried out remotely, over the internet.
- Requires an ordinary, low-privileged account.
- Requires no action from the victim.
- At risk: integrity (data can be altered), site availability.
Weakness class: CWE-22.
What to do
- Update the vulnerable component (Nex Forms – Ultimate Form Builder – Lite) 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?
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