CVE-2026-46688
Received Received - Intake

Unauthenticated URL Redirection in Meeting Room Booking System

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: GitHub, Inc.

Description
The Meeting Room Booking System (MRBS) is a PHP-based application for booking meeting rooms. Prior to version 1.12.2, an unauthenticated request can be made to redirect the user to a query-specified location. This allows an attacker to create a specially-crafted URL to an MRBS installation that will cause the user who clicks it to be redirected to the attacker-specified redirect URL, which could be a spoofed MRBS login page, for example. Version 1.12.2 contains a fix. No known workarounds are available.

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-08-13
AI Q&A
2026-08-13
EPSS Evaluated
N/A
NVD
CVE-2026-46688

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
meeting-room-booking-system mrbs to 1.12.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-601 The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

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Executive Summary

This is an unauthenticated open redirect vulnerability in the Meeting Room Booking System (MRBS), a PHP-based application. It allows attackers to craft URLs that redirect users to malicious sites, such as spoofed login pages, without requiring authentication. The flaw affects versions prior to 1.12.2.

Detection Guidance

To detect this vulnerability, check if your MRBS installation is running a version prior to 1.12.2. You can verify the version by inspecting the MRBS source code or checking the version file in the application. Additionally, monitor network traffic for suspicious redirect patterns or unauthorized URL redirections from the MRBS application.

Impact Analysis

An attacker could trick you into clicking a malicious link, redirecting you to a fake MRBS login page or other harmful site. This could lead to phishing attacks, credential theft, or malware infections. Users of unpatched MRBS versions are at risk.

Compliance Impact

This vulnerability could lead to unauthorized access to user credentials or sensitive data, potentially violating GDPR (data protection) or HIPAA (health information privacy) requirements. Organizations must patch systems to maintain compliance.

Mitigation Strategies

Immediately upgrade your MRBS installation to version 1.12.2 or later to patch the vulnerability. If upgrading is not immediately possible, consider disabling the redirect functionality or restricting access to the MRBS application until the update can be applied.

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