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

> Authenticated attackers can exploit SSRF in InstantCMS to scan networks, access local services, or cause denial of service.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Sep 2025
- **Updated:** 11 Sep 2025
- **Also known as:** GHSA-79hh-mhvg-whrw

## What is CVE-2025-59055?

CVE-2025-59055 is a medium-severity server-side request forgery vulnerability in instantsoft icms2, published on 11 Sep 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### 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.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2025-59055?

It affects 1 product.


Products: Instantcms Instantcms.

## How do I fix CVE-2025-59055?

No fix has been published for CVE-2025-59055 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-59055 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-59055 exists.

## Other vulnerabilities in instantsoft icms2

- [CVE-2023-4188](https://insights.sbomify.com/CVE-2023-4188/): SQL Injection in instantsoft/icms2 (critical 9.8)
- [CVE-2013-10051](https://insights.sbomify.com/CVE-2013-10051/): InstantCMS <= 1.6 Remote PHP Code Execution (critical 9.3)
- [CVE-2023-4704](https://insights.sbomify.com/CVE-2023-4704/): External Control of System or Configuration Setting in instantsoft/icms2 (high 8.8)
- [CVE-2026-28281](https://insights.sbomify.com/CVE-2026-28281/): InstantCMS has Multiple CSRF Vulnerabilities (high 7.1)
- [CVE-2023-4652](https://insights.sbomify.com/CVE-2023-4652/): Cross-site Scripting (XSS) - Stored in instantsoft/icms2 (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-59055 and fix it if it is affected.

What it is: CVE-2025-59055 is a medium-severity server-side request forgery vulnerability in instantsoft icms2, published on 11 Sep 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-59055 exists.

Affected product: instantsoft icms2. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-59055/ (Markdown: https://insights.sbomify.com/CVE-2025-59055/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-59055
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-59055
- OSV: https://osv.dev/vulnerability/CVE-2025-59055

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-59055/
Summaries are generated and may contain mistakes; the official description above is the record.