CVE-2026-6486
Received Received - Intake
Cross-Site Scripting in ClassroomBookings User Display Name Handler

Publication date: 2026-04-17

Last updated on: 2026-04-29

Assigner: VulDB

Description
A vulnerability was detected in classroombookings up to 2.17.0. This impacts the function read of the file crbs-core/application/views/layout.php of the component User Display Name Handler. The manipulation of the argument displayname results in cross site scripting. The attack can be executed remotely. The exploit is now public and may be used. Upgrading to version 2.17.1 will fix this issue. The patch is identified as 69c3c9bb8a17f1ea572d8f4502bf238f0214c98a. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
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Meta Information
Published
2026-04-17
Last Modified
2026-04-29
Generated
2026-06-16
AI Q&A
2026-04-18
EPSS Evaluated
2026-06-14
NVD
CVE-2026-6486
EUVD
EUVD-2026-23415
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
classroombookings classroombookings to 2.17.0 (inc)
classroombookings classroombookings 2.17.1
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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Compliance Impact

The vulnerability is a cross site scripting (XSS) issue in the User Display Name Handler component of classroombookings. This type of vulnerability can potentially be exploited to perform unauthorized actions or steal user information, which may impact the confidentiality and integrity of user data.

However, there is no specific information provided about how this vulnerability directly affects compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability exists in the classroombookings software up to version 2.17.0, specifically in the User Display Name Handler component within the file crbs-core/application/views/layout.php. It involves the manipulation of the 'displayname' argument, which leads to a cross-site scripting (XSS) vulnerability. This means an attacker can inject malicious scripts that execute in the context of a user's browser. The attack can be performed remotely.

The vulnerability has been publicly disclosed and an exploit is available. The issue is fixed in version 2.17.1 by applying a patch identified as 69c3c9bb8a17f1ea572d8f4502bf238f0214c98a.

Impact Analysis

This cross-site scripting vulnerability can allow an attacker to execute malicious scripts in the context of users who view the affected display name. This can lead to unauthorized actions such as stealing session cookies, redirecting users to malicious sites, or performing actions on behalf of the user without their consent.

Since the attack can be executed remotely, it poses a risk to any user interacting with the vulnerable application, potentially compromising user data and trust.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade the affected component classroombookings to version 2.17.1, which contains the fix.

This upgrade addresses the cross site scripting vulnerability in the User Display Name Handler component.

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