CVE-2026-124474: XSS (CVSS 6.1)

Description

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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CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

References

Other References

https://github.com/meeting-room-booking-system/mrbs-code/blob/38d51e05f4a0ab39820f3830ca5dcae5f34d8546/web/view_entry.php#L966-L969 https://github.com/meeting-room-booking-system/mrbs-code/commit/83b8253853359964f850208c28036b2bfa202466 https://github.com/meeting-room-booking-system/mrbs-code/releases/tag/v1.12.3 https://github.com/meeting-room-booking-system/mrbs-code/security/advisories/GHSA-5wqw-q7gh-j65v https://www.vulncheck.com/advisories/mrbs-before-1.12.3-reflected-xss-via-error-parameter-of-view-entry-php

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-124474? +

CVE-2026-124474 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-124474? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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