---
id: "CVE-2026-124474"
page: "https://infrastack.ai/live/CVE-2026-124474"
kind: "vulnerability"
aliases: ["CVE-2026-124474"]
title: "MRBS: reflected cross-site scripting in view_entry.php lets attackers run scripts"
severity: "medium"
cvss: 6.1
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["mrbs", "other", "php", "self-hosted"]
not_affected_if: ["mrbs-1.12.3-or-later"]
published_at: "2026-11-08T14:18:16+00:00"
first_seen_at: "2026-11-08T14:48:40+00:00"
updated_at: "2026-11-08T14:50:57+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124474", "first_seen_at": "2026-11-08T14:48:40+00:00"}]
exploit_sources: []
---

# MRBS: reflected cross-site scripting in view_entry.php lets attackers run scripts

Link for people: https://infrastack.ai/live/CVE-2026-124474 (this .md is for agents)

MRBS, a meeting room booking system, versions before 1.12.3 reflect the error parameter of view_entry.php without escaping it. An attacker who tricks a logged-in user into opening a crafted link can run script in that user's session, read CSRF tokens, and modify or delete bookings or perform administrative actions.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed MRBS version and confirm whether it is below `1.12.3`.
- Search web server logs for requests to `view_entry.php` containing `error=` with script or HTML characters.

## Fix

- MRBS: upgrade to `1.12.3` or later (patch and release notes linked from the NVD entry).

## Timeline

- 2026-11-08T14:48:40+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124474

## Documents

- [advisory] Vendor advisory: github.com https://github.com/meeting-room-booking-system/mrbs-code/security/advisories/GHSA-5wqw-q7gh-j65v
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/mrbs-before-1.12.3-reflected-xss-via-error-parameter-of-view-entry-php
- [fix] Patch: github.com https://github.com/meeting-room-booking-system/mrbs-code/commit/83b8253853359964f850208c28036b2bfa202466
- [fix] Release notes: github.com https://github.com/meeting-room-booking-system/mrbs-code/releases/tag/v1.12.3

## From the sources

MRBS (Meeting Room Booking System) before 1.12.3 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script via the error parameter of view_entry.php. Attackers can send crafted links to logged-in users to read CSRF tokens, modify or delete bookings, or perform administrative actions.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_