# CVE-2018-2476: Open redirect in SAP NetWeaver (forums)

> An attacker can redirect users to malicious sites via insufficient URL validation in SAP NetWeaver forums, potentially facilitating phishing attacks.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 Nov 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-8g8p-fjx7-326c

## What is CVE-2018-2476?

CVE-2018-2476 is a medium-severity vulnerability in Sap Netweaver, published on 13 Nov 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Due to insufficient URL Validation in forums in SAP NetWeaver versions 7.30, 7.31, 7.40, an attacker can redirect users to a malicious site.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2018-2476?

It affects 1 product.


Products: Sap Netweaver.

## How do I fix CVE-2018-2476?

No fix has been published for CVE-2018-2476 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-2476 being exploited?

There is no known exploitation of CVE-2018-2476 in the wild and no public exploit code.

## Other vulnerabilities in Sap Netweaver

- [CVE-2025-31324](https://insights.sbomify.com/CVE-2025-31324/): SAP NetWeaver Unrestricted File Upload (critical 10.0, exploited in the wild)
- [CVE-2021-38163](https://insights.sbomify.com/CVE-2021-38163/): SAP NetWeaver Unrestricted File Upload (critical 9.9, exploited in the wild)
- [CVE-2025-42999](https://insights.sbomify.com/CVE-2025-42999/): SAP NetWeaver Deserialization (critical 9.1, exploited in the wild)
- [CVE-2013-6822](https://insights.sbomify.com/CVE-2013-6822/): XML external entity in n/a (critical 10.0)
- [CVE-2011-1517](https://insights.sbomify.com/CVE-2011-1517/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-2476 and fix it if it is affected.

What it is: CVE-2018-2476 is a medium-severity vulnerability in Sap Netweaver, published on 13 Nov 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-2476 in the wild and no public exploit code.

Affected product: Sap Netweaver. 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-2018-2476/ (Markdown: https://insights.sbomify.com/CVE-2018-2476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-2476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-2476
- OSV: https://osv.dev/vulnerability/CVE-2018-2476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-2476/
Summaries are generated and may contain mistakes; the official description above is the record.