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CVE-2025-66372

Severity2.8 Low CVSS 3.1
Fixed in2.16.3
WeaknessXML external entity (XXE) (CWE-611)
Published28 Nov 2025
Updated8 Oct 2026

Description

Mustang before 2.16.3 allows exfiltrating files via XXE attacks.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.13% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

  • Protection full XXE
  • Action available security rule
  • Review automated Inferred
  • Record active
Decided by A vulnerability class already blocked by an ARMR security rule
Finding Protected by Waratek's ARMR xxe security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-611: XML External Entity Reference.
Candidate fix https://github.com/ZUGFeRD/mustangproject/pull/725 : a pull request: the change under review

How to mitigate CVE-2025-66372

Upgrade the affected software to 2.16.3 or later. Until you can, Waratek RASP blocks exploitation with its XXE rule. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.mustangproject:library 0 2.16.3 unbounded
org.mustangproject:validator 0 2.16.3 unbounded

Products and versions

2 products, 2 version entries
SourceVendorProductSchemeAffected versions
osv org.mustangproject library generic < 2.16.3
osv org.mustangproject validator generic < 2.16.3

References

URLTags
https://github.com/ZUGFeRD/mustangproject/pull/725 pr
https://github.com/ZUGFeRD/mustangproject/issues/685 WEB
https://github.com/ZUGFeRD/mustangproject/commit/6461dad8d3d7876547155dacbd28b458f1eb2e0b WEB
https://github.com/ZUGFeRD/mustangproject PACKAGE
https://github.com/ZUGFeRD/mustangproject/releases/tag/core-2.16.3 WEB

Timeline

Published2025-11-28By the CVE Program.
NVD record modified2026-10-08NVD's own last-modified date for this record.