CVE-2021-47958— CouchCMS 2.2.1 Server-Side Request Forgery via SVG upload
Possible ATT&CK Techniques 2AI
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I. Basic Information for CVE-2021-47958
Vulnerability Information
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Vulnerability Title
CouchCMS 2.2.1 Server-Side Request Forgery via SVG upload
Source: NVD (National Vulnerability Database)
Vulnerability Description
CouchCMS 2.2.1 contains a server-side request forgery vulnerability that allows authenticated attackers to make arbitrary HTTP requests by uploading malicious SVG files. Attackers can upload SVG files containing external entity references through the browse.php endpoint to access internal services and resources.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
CouchCMS 代码问题漏洞
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版本存在代码问题漏洞，该漏洞源于服务端请求伪造问题，可能导致经过身份验证的攻击者通过上传恶意SVG文件发起任意HTTP请求。
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
II. Public POCs for CVE-2021-47958
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Exploit · 1Advisory · 1
IV. Related Vulnerabilities
Same weakness: CWE-918
- CVE-2026-7798
FluentCRM <= 2.9.87 - Unauthenticated Blind Server-Side Requ - CVE-2026-7890
Concrete CMS 9.5.0 is vulnerable to SSRF via RSS Displayer B - CVE-2026-6394
Nexa Blocks <= 1.1.1 - Unauthenticated Blind Server-Side Req - CVE-2026-33637
Faraday: Protocol-relative URI objects still bypass host sco - CVE-2026-47358
terrascan 安全漏洞
V. Comments for CVE-2021-47958
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