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CVE-2020-2503— Stored cross-site scripting vulnerability in QES

Quick assessment

Affected
QNAP Systems Inc. QES
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.

QNAP QES是中国QNAP公司的一款主要应用于管理文件的桌面操作系统。 QES 2.1.1 Build 20201006 之前版本存在跨站脚本漏洞，该漏洞允许远程攻击者可利用该漏洞向File Station注入恶意代码。

CVSS 9.0 · Critical EPSS 0.78% · P53

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2020-2503

Vulnerability Information
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Vulnerability Title
Stored cross-site scripting vulnerability in QES
Source: CVE Program / CVE List V5
Vulnerability Description
If exploited, this stored cross-site scripting vulnerability could allow remote attackers to inject malicious code in File Station. QNAP has already fixed these issues in QES 2.1.1 Build 20201006 and later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
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
QNAP QES 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QNAP QES是中国QNAP公司的一款主要应用于管理文件的桌面操作系统。 QES 2.1.1 Build 20201006 之前版本存在跨站脚本漏洞，该漏洞允许远程攻击者可利用该漏洞向File Station注入恶意代码。
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
QNAP Systems Inc. QES unspecified ~ 2.1.1 -

II. Public POCs for CVE-2020-2503

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III. Intelligence Information for CVE-2020-2503

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Other References for CVE-2020-2503 (1)

Same Patch Batch · QNAP Systems Inc. · 2020-12-24 · 4 CVEs total

CVE-2020-2499 6.3 MEDIUM Hard-coded Password Vulnerability in QES
CVE-2020-2504 5.8 MEDIUM Absolute path traversal vulnerability in QES
CVE-2020-2505 2.3 LOW Sensitive information via generation of error messages vulnerability in QES

IV. Related Vulnerabilities

Same product: QES
Same vendor: QNAP Systems Inc.
Same weakness: CWE-79

V. Comments for CVE-2020-2503

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