CVE-2026-6486

classroombookings User Display Name layout.php read cross site scripting

CVSS 5.1 MEDIUMEPSS 0.2%CWE-79 CWE-94

Vexday Risk Score

33Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS 5.1EPSS 0.2%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado

Lifecycle

17 Apr 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Affected products

n/a · classroombookings

public PoCs found — 1

cve_referencegithub.com/sudo-secure/security-research/blob/main/classroombookings/stored-xss/PoC.mdunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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