CVE-2026-6486 classroombookings User Display Name layout.php read cross site scripting
Remote attackers can inject malicious scripts via the user display name field in classroombookings, potentially leading to session hijacking or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-6486?
CVE-2026-6486 is a medium-severity cross-site scripting vulnerability in classroombookings, published on 17 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-6486?
How do I fix CVE-2026-6486?
No fix has been published for CVE-2026-6486 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-6486 being exploited?
There is no known exploitation of CVE-2026-6486 in the wild and no public exploit code.
Sources
Also known as GHSA-376w-pjjp-jrvj.