Unrated severityNVD Advisory· Published Jun 18, 2026
Reflected XSS in LMS
CVE-2026-40457
Description
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.
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Affected products
1Patches
Vulnerability mechanics
References
3- github.com/chilek/lms/commit/9c5651b39bfd086cc34fc9a78ddaa8c0815af114mitrepatch
- cert.pl/posts/2026/06/CVE-2026-40455mitrethird-party-advisory
- lms.org.plmitreproduct
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