XSS in Meeting-Room-Booking-System Mrbs-Code
CVE-2026-124474
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- github.com/meeting-room-booking-system/mrbs-code/blob/38d51e05f4a0ab39820f3830c… (technical-description)
- github.com/meeting-room-booking-system/mrbs-code/commit/83b8253853359964f850208… (patch)
- github.com/meeting-room-booking-system/mrbs-code/releases/tag/v1.12.3 (release-notes)
- github.com/meeting-room-booking-system/mrbs-code/security/advisories/GHSA-5wqw-… (vendor-advisory)
- www.vulncheck.com/advisories/mrbs-before-1.12.3-reflected-xss-via-error-paramet… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124474?
- CVE-2026-124474 is a medium-severity vulnerability in Meeting-Room-Booking-System Mrbs-Code, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-11-08.
- How severe is CVE-2026-124474?
- Medium severity. CVSS v3 base score is 6.1 out of 10.