CVE-2025-59055

HIGH EPSS 34.0%
Published Sep 11, 20259mo ago · Modified Jun 17, 20261w ago
7.2 CVSS 3.1
High
Find Similar
Published Sep 11, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.2
Exploitability
1.2
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
34.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

Affected Products 1

VendorProductVersionRange
instantcmsinstantcms* ≤2.17.3

References 2

  • github.com https://github.com/instantsoft/icms2/commit/fa997bdab3429fad0c850966bfacbcb96d5ab041
    Patch
  • github.com https://github.com/instantsoft/icms2/security/advisories/GHSA-79hh-mhvg-whrw
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/instantsoft/icms2/commit/fa997bdab3429fad0c850966bfacbcb96d5ab041
    Patch