CVE-2026-6486
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://github.com/classroombookings/classroombookings/
- https://github.com/classroombookings/classroombookings/commit/69c3c9bb8a17f1ea572d8f4502bf238f0214c98a
- https://github.com/classroombookings/classroombookings/pull/83
- https://github.com/classroombookings/classroombookings/releases/tag/v2.17.1
- https://github.com/sudo-secure/security-research/blob/main/classroombookings/stored-xss/PoC.md
- https://vuldb.com/submit/786154
- https://vuldb.com/vuln/358027
- https://vuldb.com/vuln/358027/cti
CWEs
CWE-79 CWE-94
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.