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CVE-2026-34497— FMS Employee Vulnerable to HTML Injection

Quick assessment

Affected
Johnson Controls FM Systems Employee
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.

Johnson Controls FM Systems Employee是美国Johnson Controls公司开源的一款企业人力资源管理软件。 Johnson Controls FM Systems Employee 2025.3.1之前版本存在跨站脚本漏洞，该漏洞源于网页中脚本相关HTML标签中和不当，可能导致跨站脚本攻击。

CVSS 4.8 · Medium EPSS 0.23% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
Johnson Controls FM Systems Employee < 2025.3.1 affected
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I. Basic Information for CVE-2026-34497

Vulnerability Information
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Vulnerability Title
FMS Employee Vulnerable to HTML Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in Johnson Controls FM Systems Employee allows Cross-Site Scripting (XSS). This issue affects FM Systems Employee: before 2025.3.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Johnson Controls FM Systems Employee 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Johnson Controls FM Systems Employee是美国Johnson Controls公司开源的一款企业人力资源管理软件。 Johnson Controls FM Systems Employee 2025.3.1之前版本存在跨站脚本漏洞，该漏洞源于网页中脚本相关HTML标签中和不当，可能导致跨站脚本攻击。
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
Johnson Controls FM Systems Employee 0 ~ 2025.3.1 -

II. Public POCs for CVE-2026-34497

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III. Intelligence Information for CVE-2026-34497

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Vendor Pages for CVE-2026-34497 (1)

Same Patch Batch · Johnson Controls · 2026-07-31 · 4 CVEs total

CVE-2026-34490 4.8 MEDIUM XAAP Android Data Stored in Unencrypted Database
CVE-2026-21662 4.8 MEDIUM FMS Employee Allows Upload of Unrestricted Files
CVE-2026-34495 4.8 MEDIUM FMS Employee vulnerable to XSS

IV. Related Vulnerabilities

Same product: FM Systems Employee
Same vendor: Johnson Controls
Same weakness: CWE-80