Cross-Site Scripting Vulnerability in SourceCodester Online Quiz System
CVE-2026-4973

5.1MEDIUM

Key Information:

Vendor

Sourcecodester
Status
Online Quiz System
Vendor
CVE Published:
27 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4973?

A cross-site scripting vulnerability exists in the SourceCodester Online Quiz System, specifically within the add-question.php file. This vulnerability allows attackers to manipulate the quiz_question parameter, enabling them to inject malicious scripts. The remote exploitation potential of this vulnerability poses significant risks to users, as it can allow attackers to execute arbitrary script code in the context of the affected user’s browser.

Affected Version(s)

Online Quiz 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-2026-4973 - Proof of Concept

References

https://vuldb.com/?id.353860
vdb-entrytechnical-description
https://vuldb.com/?ctiid.353860
signaturepermissions-required
https://vuldb.com/?submit.778101
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

Anas22335 (VulDB User)
.