Vulnerability · Published Sep 11, 2025 · Assigned by GitHub_M
CVE-2025-59055InstantCMS vulnerable to Server-Side Request Forgery via package installer
Medium 4.7
In plain English
A medium-severity server-side request forgery in icms2 from instantsoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| instantsoft | icms2 | <= 2.17.3 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L