Missing Authentication Vulnerability in CloudClassroom-PHP-Project by mathurvishal
CVE-2026-100876

5.3MEDIUM

Key Information:

Vendor

Mathurvishal

Status
Cloudclassroom-PHP-project
Vendor
CVE Published:
27 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-100876?

A vulnerability exists in the mathurvishal CloudClassroom-PHP-Project primarily located in the loginlinkstudent.php file. This flaw arises from the improper handling of the user email argument, allowing unauthorized access due to missing authentication checks. The vulnerability has been exploited publicly, enabling remote attackers to manipulate the login flow. As the project follows a rolling release model, specific version information for potentially affected updates is not provided. The vendor has been notified of this issue but has not responded.

Affected Version(s)

CloudClassroom-PHP-Project 5dadec098bfbbf3300d60c3494db3fb95b66e7be

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-2026-100876 - Proof of Concept

References

https://vuldb.com/vuln/410806
vdb-entrytechnical-description
https://vuldb.com/vuln/410806/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-100876
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

rmsbpro (VulDB User)
VulDB CNA Team
.