CVE-2026-19860 JetFormBuilder 3.5.6.2 - 3.6.5.2 - Admin+ Arbitrary File Deletion via Server-Side Validation Callback
Administrators can delete arbitrary server files via unsafe validation callbacks, requiring form submission to trigger.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19860?
CVE-2026-19860 is a medium-severity vulnerability in Unknown JetFormBuilder — Dynamic Blocks Form Builder, published on 19 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before 3.6.5.3 does not sufficiently restrict which PHP functions can be used as a custom field-validation callback, relying on a blocklist that omits a file-deletion function, allowing users able to manage forms to cause arbitrary files on the server to be deleted. The deletion itself is carried out when the form is submitted, which requires no authentication.
Weakness: CWE-73
Which versions are affected by CVE-2026-19860?
How do I fix CVE-2026-19860?
No fix has been published for CVE-2026-19860 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19860 being exploited?
There is no known exploitation of CVE-2026-19860 in the wild and no public exploit code.
Sources
Also known as GHSA-mqwg-84ff-gqhv.