Cross-Site Scripting Vulnerability in mathurvishal CloudClassroom-PHP-Project
CVE-2026-120343

5.3MEDIUM

Key Information:

Vendor

Mathurvishal

Status
Cloudclassroom-PHP-project
Vendor
CVE Published:
2 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-120343?

A cross-site scripting flaw has been identified in the CloudClassroom-PHP-Project, specifically within the manageassessment2.php file. The vulnerability arises from improperly handled input in the ExamName parameter, allowing attackers to manipulate the argument and execute arbitrary JavaScript in the context of the user's session. This exploit can be executed remotely, posing significant risks to users. Despite attempts to notify the vendor, no response has been received regarding this critical security issue. Continuous delivery practices complicate identifying specific affected versions.

Affected Version(s)

CloudClassroom-PHP-Project 5dadec098bfbbf3300d60c3494db3fb95b66e7be

CloudClassroom-PHP-Project c46ce5736007d9d6e51a8feeb9250729fe85f139

CloudClassroom-PHP-Project dae0c5961a35a4faf28cde9e02117538f09f81c1

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-2026-120343 - Proof of Concept

References

https://vuldb.com/vuln/429668
vdb-entrytechnical-description
https://vuldb.com/vuln/429668/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-120343
third-party-advisory

CVSS V4

Score:
5.3
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

fernando viana (VulDB User)
VulDB CNA Team
.