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CVE-2021-34582— Phoenix Contact: FL MGUARD XSS through web-based management and REST API

Quick assessment

Affected
PHOENIX CONTACT FL MGUARD
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.

Phoenix Contact Fl Mguard 1102是德国Phoenix Contact公司的一个安全路由器。用于保护工业网络免受 Ip 欺骗、拒绝服务 (Dos) 和 Syn 泛洪等攻击。 Phoenix Contact FL MGUARD 1102 和 1105 中存在跨站脚本漏洞，具有高权限的用户可以通过基于 Web 的管理或带有操纵证书文件的 REST API 注入 HTML 代码 (XSS)。

CVSS 4.8 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-34582

Vulnerability Information
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Vulnerability Title
Phoenix Contact: FL MGUARD XSS through web-based management and REST API
Source: CVE Program / CVE List V5
Vulnerability Description
In Phoenix Contact FL MGUARD 1102 and 1105 in Versions 1.4.0, 1.4.1 and 1.5.0 a user with high privileges can inject HTML code (XSS) through web-based management or the REST API with a manipulated certificate file.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A: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
Phoenix Contact Fl Mguard 1102 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Phoenix Contact Fl Mguard 1102是德国Phoenix Contact公司的一个安全路由器。用于保护工业网络免受 Ip 欺骗、拒绝服务 (Dos) 和 Syn 泛洪等攻击。 Phoenix Contact FL MGUARD 1102 和 1105 中存在跨站脚本漏洞，具有高权限的用户可以通过基于 Web 的管理或带有操纵证书文件的 REST API 注入 HTML 代码 (XSS)。
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
PHOENIX CONTACT FL MGUARD 1.4.0 ~ FL MGUARD 1102 (No. 1153079)* -

II. Public POCs for CVE-2021-34582

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III. Intelligence Information for CVE-2021-34582

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Other References for CVE-2021-34582 (1)

IV. Related Vulnerabilities

Same product: FL MGUARD
Same vendor: PHOENIX CONTACT
Same weakness: CWE-79

V. Comments for CVE-2021-34582

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