# CVE-2025-42999: SAP NetWeaver Deserialization

> A privileged user can upload malicious content to the Visual Composer Metadata Uploader, leading to host system compromise via insecure deserialization.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 15 May 2025 (CISA KEV), used in ransomware
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 May 2025
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-rgq9-rg7j-xm4x

## What is CVE-2025-42999?

CVE-2025-42999 is a critical unsafe deserialization vulnerability in Sap Netweaver, published on 13 May 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

SAP NetWeaver Visual Composer Metadata Uploader is vulnerable when a privileged user can upload untrusted or malicious content which, when deserialized, could potentially lead to a compromise of confidentiality, integrity, and availability of the host system.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2025-42999?

It affects 1 product.


Products: Sap Netweaver.

## How do I fix CVE-2025-42999?

No fix has been published for CVE-2025-42999 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 5 Jun 2025.

## Is CVE-2025-42999 being exploited?

Yes. Attackers have exploited CVE-2025-42999 in the wild since at least 15 May 2025, including in ransomware campaigns.

## 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-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)
- [CVE-2013-1592](https://insights.sbomify.com/CVE-2013-1592/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-42999 and fix it if it is affected.

What it is: CVE-2025-42999 is a critical unsafe deserialization vulnerability in Sap Netweaver, published on 13 May 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2025-42999 in the wild since at least 15 May 2025, including in ransomware campaigns.

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-2025-42999/ (Markdown: https://insights.sbomify.com/CVE-2025-42999/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-42999
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-42999
- OSV: https://osv.dev/vulnerability/CVE-2025-42999

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-42999/
Summaries are generated and may contain mistakes; the official description above is the record.