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CVE-2021-47955— CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload

Quick assessment

Affected
CouchCMS CouchCMS
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.

CouchCMS是CouchCMS开源的一套面向设计人员的开源内容管理系统（CMS）。 CouchCMS 2.2.1版本存在跨站脚本漏洞，该漏洞源于跨站脚本问题，可能导致经过身份验证的攻击者通过文件上传功能上传恶意SVG文件执行任意JavaScript。

CVSS 5.4 · Medium EPSS 0.17% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
CouchCMS CouchCMS 2.2.1 affected
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I. Basic Information for CVE-2021-47955

Vulnerability Information
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Vulnerability Title
CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload
Source: CVE Program / CVE List V5
Vulnerability Description
CouchCMS 2.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to execute arbitrary JavaScript by uploading malicious SVG files through the file upload functionality. Attackers can upload SVG files containing embedded script tags to the browse.php endpoint, which are then executed in users' browsers when the files are accessed or previewed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
CouchCMS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CouchCMS是CouchCMS开源的一套面向设计人员的开源内容管理系统（CMS）。 CouchCMS 2.2.1版本存在跨站脚本漏洞，该漏洞源于跨站脚本问题，可能导致经过身份验证的攻击者通过文件上传功能上传恶意SVG文件执行任意JavaScript。
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
CouchCMS CouchCMS 2.2.1 -

II. Public POCs for CVE-2021-47955

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III. Intelligence Information for CVE-2021-47955

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Vendor Advisories for CVE-2021-47955 (1)

Exploits & Public PoCs for CVE-2021-47955 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-47955

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