Cross-Site Scripting Vulnerability in Classroom Bookings by Classroombookings
CVE-2026-6486

5.1MEDIUM

Key Information:

Vendor

Classroombookings

Status
Classroombookings
Vendor
CVE Published:
17 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6486?

A cross-site scripting vulnerability was identified in Classroom Bookings versions up to 2.17.0, specifically within the User Display Name Handler component. The vulnerability arises from improper handling of the 'displayname' argument in the file crbs-core/application/views/layout.php, allowing attackers to execute exploits remotely. Affected systems are at risk as the exploit has been made public. It is crucial for users to upgrade to version 2.17.1, where the issue has been resolved promptly by the vendor, reflecting their commitment to security and user safety.

Affected Version(s)

classroombookings 2.0

classroombookings 2.1

classroombookings 2.2

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-2026-6486 - Proof of Concept

References

https://vuldb.com/vuln/358027
vdb-entrytechnical-description
https://vuldb.com/vuln/358027/cti
signaturepermissions-required
https://vuldb.com/submit/786154
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

sudosme (VulDB User)
VulDB CNA Team
.