SQL Injection Vulnerability in projectworlds Online Notes Sharing System 1.0
CVE-2026-4540

6.9MEDIUM

Key Information:

Vendor

Projectworlds

Status
Online Notes Sharing System
Vendor
CVE Published:
22 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4540?

A SQL injection vulnerability exists in the projectworlds Online Notes Sharing System 1.0, specifically within the processing of the /login.php file in the Parameters Handler component. Attackers can manipulate the 'Benutzer' argument to execute arbitrary SQL commands remotely. This critical issue has been publicly disclosed and can be exploited easily, posing a significant risk to the security of the system.

Affected Version(s)

Online Notes Sharing System 1.0

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-2026-4540 - Proof of Concept

References

https://vuldb.com/?id.352357
vdb-entrytechnical-description
https://vuldb.com/?ctiid.352357
signaturepermissions-required
https://vuldb.com/?submit.774686
third-party-advisory

CVSS V4

Score:
6.9
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

j-jcp (VulDB User)
.