Inadequate PHP Function Restriction in JetFormBuilder Plugin for WordPress
CVE-2026-19860

5.5MEDIUM

Key Information:

Vendor

WordPress
Status
Jetformbuilder — Dynamic Blocks Form Builder
Vendor
CVE Published:
19 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19860?

The JetFormBuilder WordPress plugin before version 3.6.5.3 permits insufficiently restricted PHP functions as custom field-validation callbacks. This loophole allows users with form management privileges to execute arbitrary file deletions on the server. The vulnerability is exploited during form submission, which does not necessitate authentication, exposing websites to potentially severe risks.

Affected Version(s)

JetFormBuilder — Dynamic Blocks Form Builder 3.5.6.2 < 3.6.5.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19860 - Proof of Concept

References

https://wpscan.com/vulnerability/d73d8d27-6dad-4a7f-bf51-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sai Praneeth Koti
WPScan
.