Session Fixation Vulnerability in CloudClassroom-PHP-Project by mathurvishal
CVE-2026-121501

5.3MEDIUM

Key Information:

Vendor

Mathurvishal

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-121501?

A session fixation vulnerability has been discovered in the mathurvishal CloudClassroom-PHP-Project. The flaw lies within the session_regenerate_id function, specifically in the loginlinkadmin.php file. An attacker can exploit this vulnerability by manipulating the PHPSESSID argument, leading to unauthorized access to user sessions. Since this vulnerability can be exploited remotely and has been publicly disclosed, it poses a significant risk to users of the product. It is important to note that the vendor has not responded to inquiries concerning this issue.

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-2026-121501 - Proof of Concept

References

https://vuldb.com/vuln/430283
vdb-entrytechnical-description
https://vuldb.com/vuln/430283/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121501
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:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

rmsbpro (VulDB User)
VulDB CNA Team
.