# CVE-2023-30803: Sangfor Next-Gen Application Firewall Authentication Bypass

> Remote attackers can bypass authentication and access administrative functions by sending crafted HTTP headers, requiring immediate patching.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Oct 2023
- **Updated:** 28 Nov 2025
- **Also known as:** GHSA-rch9-592x-rrw8

## What is CVE-2023-30803?

CVE-2023-30803 is a critical authentication bypass vulnerability in Sangfor Net-Gen Application Firewall, published on 10 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Sangfor Next-Gen Application Firewall version NGAF8.0.17 is vulnerable to an authentication bypass vulnerability. A remote and unauthenticated attacker can bypass authentication and access administrative functionality by sending HTTP requests using a crafted Y-forwarded-for header.

Weakness: CWE-290 (Authentication Bypass by Spoofing)

## Which versions are affected by CVE-2023-30803?

It affects 1 product.


Products: Sangfor Next-Gen Application Firewall.

## How do I fix CVE-2023-30803?

No fix has been published for CVE-2023-30803 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-30803 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-30803 exists.

## Other vulnerabilities in Sangfor Net-Gen Application Firewall

- [CVE-2023-30805](https://insights.sbomify.com/CVE-2023-30805/): Sangfor Next-Gen Application Firewall Login Un Param Command Injection (critical 9.8)
- [CVE-2023-30806](https://insights.sbomify.com/CVE-2023-30806/): Sangfor Next-Gen Application Firewall PHPSESSID Command Injection (critical 9.8)
- [CVE-2023-30804](https://insights.sbomify.com/CVE-2023-30804/): Sangfor Next-Gen Application Firewall Authenticated File Disclosure (medium 6.9)
- [CVE-2023-30802](https://insights.sbomify.com/CVE-2023-30802/): Sangfor Next-Gen Application Firewall Source Code Disclosure (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-30803 and fix it if it is affected.

What it is: CVE-2023-30803 is a critical authentication bypass vulnerability in Sangfor Net-Gen Application Firewall, published on 10 Oct 2023. 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-2023-30803 exists.

Affected product: Sangfor Net-Gen Application Firewall. 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-2023-30803/ (Markdown: https://insights.sbomify.com/CVE-2023-30803/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-30803
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-30803
- OSV: https://osv.dev/vulnerability/CVE-2023-30803

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-30803/
Summaries are generated and may contain mistakes; the official description above is the record.