Unrestricted File Upload Vulnerability in Form Tools by formtools.org
CVE-2026-103541

5.3MEDIUM

Key Information:

Vendor

Formtools.org

Status
Form Tools
Vendor
CVE Published:
1 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-103541?

A vulnerability was discovered in Form Tools that allows for unrestricted file uploads due to a flaw in the uploadFile function within the Ajax Handler component. This issue is present in versions up to 3.1.1. The flaw enables remote attackers to exploit the vulnerability and upload arbitrary files, posing a significant security risk. Despite being informed of this issue, the developers have yet to respond effectively, leaving users vulnerable to potential attacks. The exploit is now publicly accessible, increasing the urgency for users to address this issue promptly.

Affected Version(s)

Form Tools 3.1.0

Form Tools 3.1.1

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-2026-103541 - Proof of Concept

References

https://vuldb.com/vuln/412351
vdb-entrytechnical-description
https://vuldb.com/vuln/412351/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-103541
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

wenyouwen (VulDB User)
VulDB CNA Team
.