CVE-2026-40457

Reflected XSS in LMS

CVSS 2.1 LOWEPSS 0.3%CWE-79

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 2.1EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

18 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

A Reflected Cross-Site Scripting (XSS) vulnerability exists in LMS (LAN Management System) before commit 9c5651b in the "dbrecover.php" and "netremap.php" modules where unsanitized GET parameters are directly embedded into HTML output. This allows an attacker to inject arbitrary JavaScript when an authenticated user clicks a crafted link, provided the required conditions (such as a network defined in the system) are met.

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

Affected products

LMS · LMS

References

https://cert.pl/posts/2026/06/CVE-2026-40455 https://github.com/chilek/lms/commit/9c5651b39bfd086cc34fc9a78ddaa8c0815af114 https://lms.org.pl/