CVE-2025-29953: Apache.NMS.ActiveMQ Apache ActiveMQ NMS OpenWire Client Vulnerability

CRITICAL
Advisory Identifier: GHSA-9g64-r942-fvmp
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CVSS 9.8
CWE-502
Published
Advisory Summary

CVE-2025-29953 is a CRITICAL (CVSS 9.8) apache activemq nms openwire client vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Apache.NMS.ActiveMQ libraries in the NuGet ecosystem. The issue involves apache activemq nms openwire client deserialization of untrusted data vulnerability. Remediation is available by upgrading affected packages to version 2.1.1.

CVE-2025-29953 at a Glance

CVE Identifier CVE-2025-29953
GHSA Identifier GHSA-9g64-r942-fvmp
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Apache.NMS.ActiveMQ
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2025-29953

To remediate this vulnerability, upgrade all affected Apache.NMS.ActiveMQ dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Apache.NMS.ActiveMQ fixed: 2.1.1 
Upgrade Apache.NMS.ActiveMQ to 2.1.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Apache.NMS.ActiveMQ

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-29953, inspect your project dependencies for Apache.NMS.ActiveMQ:

inspect dependencies for Apache.NMS.ActiveMQ

Analyze the terminal output to locate any version of Apache.NMS.ActiveMQ in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.1.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Apache.NMS.ActiveMQ, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Deserialization of Untrusted Data vulnerability in Apache ActiveMQ NMS OpenWire Client. This issue affects Apache ActiveMQ NMS OpenWire Client before 2.1.1 when performing connections to untrusted servers. Such servers could abuse the unbounded deserialization in the client to provide malicious responses that may eventually cause arbitrary code execution on the client. Version 2.1.0 introduced a allow/denylist feature to restrict deserialization, but this feature could be bypassed. The .NET team has deprecated the built-in .NET binary serialization feature starting with .NET 9 and suggests migrating away from binary serialization. The project is considering to follow suit and drop this part of the NMS API altogether. Users are recommended to upgrade to version 2.1.1, which fixes the issue. We also recommend to migrate away from relying on .NET binary serialization as a hardening method for the future.

CVE-2025-29953 Affected Apache.NMS.ActiveMQ Versions

1 component(s)
Fixed Versions:
2.1.1
Product / Package Ecosystem Affected Versions Fixed Version
Apache.NMS.ActiveMQ
nuget/Apache.NMS.ActiveMQ
NuGet
< 2.1.1
2.1.1

References

NVD — CVE-2025-29953 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-29953
Security Fix Commit FIX COMMIT
https://github.com/apache/activemq-nms-openwire/commit/8944c41
Apache.NMS.ActiveMQ Source Repository REPOSITORY
https://github.com/apache/activemq-nms-openwire
issues.apache.org/jira/browse/amqnet-... WEB
https://issues.apache.org/jira/browse/AMQNET-844
lists.apache.org/thread/vc1sj9y3056d... WEB
https://lists.apache.org/thread/vc1sj9y3056d3kkhcvrs9fyw5w8kpmlx
Apache.NMS.ActiveMQ Security Information SECURITY
http://www.openwall.com/lists/oss-security/2025/04/18/3

Frequently Asked Questions

What is CVE-2025-29953?
CVE-2025-29953 is a security vulnerability in Apache.NMS.ActiveMQ involving Apache ActiveMQ NMS OpenWire Client Deserialization of Untrusted Data vulnerability under CWE-502: Deserialization of Untrusted Data.
Which Apache.NMS.ActiveMQ versions are affected?
Affected versions include releases prior to 2.1.1 across affected packages: Apache.NMS.ActiveMQ.
What version fixes CVE-2025-29953?
Upgrading to 2.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Apache.NMS.ActiveMQ affected?
Yes, Apache.NMS.ActiveMQ is affected in releases prior to 2.1.1. Upgrade your dependency to 2.1.1 or later.
What is the CVSS score of CVE-2025-29953?
CVE-2025-29953 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2025-29953?
CVE-2025-29953 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check NuGet dependencies for CVE-2025-29953?
Run the dependency tree command: 'inspect dependencies for Apache.NMS.ActiveMQ'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9g64-r942-fvmp",
  "modified" : "2025-04-23T19:37:59Z",
  "published" : "2025-04-18T18:31:23Z",
  "aliases" : [ "CVE-2025-29953" ],
  "summary" : "Apache ActiveMQ NMS OpenWire Client Deserialization of Untrusted Data vulnerability",
  "details" : "Deserialization of Untrusted Data vulnerability in Apache ActiveMQ NMS OpenWire Client.\n\nThis issue affects Apache ActiveMQ NMS OpenWire Client before 2.1.1 when performing connections to untrusted servers. Such servers could abuse the unbounded deserialization in the client to provide malicious responses that may eventually cause arbitrary code execution on the client. Version 2.1.0 introduced a allow/denylist feature to restrict deserialization, but this feature could be bypassed.\n\nThe .NET team has deprecated the built-in .NET binary serialization feature starting with .NET 9 and suggests migrating away from binary serialization. The project is considering to follow suit and drop this part of the NMS API altogether.\n\nUsers are recommended to upgrade to version 2.1.1, which fixes the issue. We also recommend to migrate away from relying on .NET binary serialization as a hardening method for the future.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Apache.NMS.ActiveMQ"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-29953"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/activemq-nms-openwire/commit/8944c41"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/activemq-nms-openwire"
  }, {
    "type" : "WEB",
    "url" : "https://issues.apache.org/jira/browse/AMQNET-844"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/vc1sj9y3056d3kkhcvrs9fyw5w8kpmlx"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2025/04/18/3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-23T19:37:59Z",
    "nvd_published_at" : "2025-04-18T16:15:22Z"
  }
}