Cross Site Scripting Vulnerability in projeto-siga Application by projeto-siga
CVE-2026-6990

5.1MEDIUM

Key Information:

Vendor

Projeto-siga

Status
Siga
Vendor
CVE Published:
25 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6990?

A cross site scripting vulnerability exists in the projeto-siga application version 11.0.3.18, specifically in an unknown function within the file /sigawf/app/responsavel/novo. This flaw allows an attacker to manipulate parameters, particularly the Nome/Descrição arguments, to execute arbitrary scripts in the context of the user. This could lead to session hijacking, data theft, and other malicious activities. Despite being reported, the project maintainers have not yet addressed the issue, leaving users at risk for exploitation by remote attackers.

Affected Version(s)

siga 11.0.3.18

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-2026-6990 - Proof of Concept

References

https://vuldb.com/vuln/359542
vdb-entrytechnical-description
https://vuldb.com/vuln/359542/cti
signaturepermissions-required
https://vuldb.com/submit/796647
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

vini_castro (VulDB User)
VulDB CNA Team
.