# CVE-2021-47703: OpenBMCS Server Side Request Forgery (SSRF) via /php/query.php

> Unauthenticated attackers can exploit SSRF in OpenBMCS to bypass firewalls, enumerate internal networks, and hijack sessions.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Dec 2025
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-hff9-gq78-65hw

## What is CVE-2021-47703?

CVE-2021-47703 is a medium-severity server-side request forgery vulnerability in OpenBMCS, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

OpenBMCS 2.4 contains an unauthenticated SSRF vulnerability that allows attackers to bypass firewalls and initiate service and network enumeration on the internal network through the affected application, allowing hijacking of current sessions. Attackers can specify an external domain in the 'ip' parameter to force the application to make an HTTP request to an arbitrary destination host.

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

## Which versions are affected by CVE-2021-47703?

It affects 1 product.


Products: Openbmcs Openbmcs.

## How do I fix CVE-2021-47703?

No fix has been published for CVE-2021-47703 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47703 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47703 exists.

## Other vulnerabilities in OpenBMCS

- [CVE-2021-47701](https://insights.sbomify.com/CVE-2021-47701/): OpenBMCS User Management Privilege Escalation (high 8.7)
- [CVE-2021-47704](https://insights.sbomify.com/CVE-2021-47704/): OpenBMCS SQL Injection via obix_test.php (high 8.7)
- [CVE-2021-47718](https://insights.sbomify.com/CVE-2021-47718/): OpenBMCS Directory Listing Information Disclosure (high 8.7)
- [CVE-2021-47702](https://insights.sbomify.com/CVE-2021-47702/): OpenBMCS Cross Site Request Forgery (CSRF) via sendFeedback.php (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47703 and fix it if it is affected.

What it is: CVE-2021-47703 is a medium-severity server-side request forgery vulnerability in OpenBMCS, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47703 exists.

Affected product: OpenBMCS. 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-2021-47703/ (Markdown: https://insights.sbomify.com/CVE-2021-47703/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47703
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47703
- OSV: https://osv.dev/vulnerability/CVE-2021-47703

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47703/
Summaries are generated and may contain mistakes; the official description above is the record.