Authorization Bypass in Invoice Ninja Vendor Portal Profile Update by Invoice Ninja
CVE-2026-83743

5.3MEDIUM

Key Information:

Vendor

Invoiceninja

Status
Invoice Ninja
Vendor
CVE Published:
1 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-83743?

A significant security flaw exists in Invoice Ninja's Vendor Portal Profile Update functionality, specifically affecting version 5.13.26. This vulnerability arises from inadequate authorization checks that allow attackers to manipulate the 'vendor_contact' parameter. As a result, a remote attacker could exploit this weakness to gain unauthorized access to sensitive areas of the application. The community has made the exploit details publicly available, underscoring the urgency for users to update to version 5.13.27, which includes a necessary patch to mitigate this vulnerability.

Affected Version(s)

Invoice Ninja 5.13.0

Invoice Ninja 5.13.1

Invoice Ninja 5.13.2

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-2026-83743 - Proof of Concept

References

https://vuldb.com/vuln/397499
vdb-entrytechnical-description
https://vuldb.com/vuln/397499/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-83743
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

MAVERICK-VF142 (VulDB User)
.