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CVE-2025-59055— InstantCMS vulnerable to Server-Side Request Forgery via package installer

Quick assessment

Affected
instantsoft icms2
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.

InstantCMS是instantSoft开源的一个免费的开源 CMS。 InstantCMS 2.17.3及之前版本存在代码问题漏洞，该漏洞源于安装程序功能中package参数未经验证，可能导致服务端请求伪造攻击。

CVSS 4.7 · Medium EPSS 0.45% · P37
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I. Basic Information for CVE-2025-59055

Vulnerability Information
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Vulnerability Title
InstantCMS vulnerable to Server-Side Request Forgery via package installer
Source: CVE Program / CVE List V5
Vulnerability Description
InstantCMS is a free and open source content management system. A blind Server-Side Request Forgery (SSRF) vulnerability in InstantCMS up to and including 2.17.3 allows authenticated remote attackers to make nay HTTP/HTTPS request via the package parameter. It is possible to make any HTTP/HTTPS request to any website in installer functionality. Due to such vulnerability it is possible to for example scan local network, call local services and its functions, conduct a DoS attack, and/or disclose a server's real IP if it's behind a reverse proxy. It is also possible to exhaust server resources by sending plethora of such requests. As of time of publication, no patched releases are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
InstantCMS 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
InstantCMS是instantSoft开源的一个免费的开源 CMS。 InstantCMS 2.17.3及之前版本存在代码问题漏洞，该漏洞源于安装程序功能中package参数未经验证，可能导致服务端请求伪造攻击。
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
instantsoft icms2 <= 2.17.3 -

II. Public POCs for CVE-2025-59055

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III. Intelligence Information for CVE-2025-59055

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Vendor Advisories for CVE-2025-59055 (1)

IV. Related Vulnerabilities

Same product: icms2
Same vendor: instantsoft
Same weakness: CWE-918

V. Comments for CVE-2025-59055

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