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CVE-2026-40457— Reflected XSS in LMS

Quick assessment

Affected
LMS LMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

lms是lms个人开发者开源的一款学习管理系统软件。 lms 9c5651b之前版本存在跨站脚本漏洞，该漏洞源于未清理的GET参数直接嵌入到HTML输出中，可能导致反射型跨站脚本攻击。

AI Predicted 6.1 Difficulty: Trivial EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
LMS LMS < 9c5651b affected
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I. Basic Information for CVE-2026-40457

Vulnerability Information
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Vulnerability Title
Reflected XSS in LMS
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
lms 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
lms是lms个人开发者开源的一款学习管理系统软件。 lms 9c5651b之前版本存在跨站脚本漏洞，该漏洞源于未清理的GET参数直接嵌入到HTML输出中，可能导致反射型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LMS LMS 0 ~ 9c5651b -

II. Public POCs for CVE-2026-40457

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III. Intelligence Information for CVE-2026-40457

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Patches & Fixes for CVE-2026-40457 (1)

Security Blog Posts for CVE-2026-40457 (1)

Vendor Pages for CVE-2026-40457 (1)

Same Patch Batch · LMS · 2026-06-18 · 3 CVEs total

CVE-2026-40456 OS Command Injection in LMS
CVE-2026-40455 SQL Injection in LMS

IV. Related Vulnerabilities

Same product: LMS
Same vendor: LMS
Same weakness: CWE-79

V. Comments for CVE-2026-40457

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