CVE-2025-59055 MEDIUM

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

Vendor Instantsoft
Product icms2
Weakness CWE-918 · SSRF
Published September 11, 2025
Last update September 11, 2025
View on NVD All CVEs

CVSS base score

4.7/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 11, 2025 CVE published
September 11, 2025 Record updated