GHSA-4mjw-xr5x-prpc — critical GitHub Advisory (CVE-2025-54539) in nuget/Apache.NMS.AMQP

Description

A Deserialization of Untrusted Data vulnerability exists in the Apache ActiveMQ NMS AMQP Client.

This issue affects all versions of Apache ActiveMQ NMS AMQP up to and including 2.3.0, when establishing connections to untrusted AMQP servers. Malicious servers could exploit unbounded deserialization logic present in the client to craft responses that may lead to arbitrary code execution on the client side.

Although version 2.1.0 introduced a mechanism to restrict deserialization via allow/deny lists, the protection was found to be bypassable under certain conditions.

In line with Microsoft’s deprecation of binary serialization in .NET 9, the project is evaluating the removal of .NET binary serialization support from the NMS API entirely in future releases.

Mitigation and Recommendations:
Users are strongly encouraged to upgrade to version 2.4.0 or later, which resolves the issue. Additionally, projects depending on NMS-AMQP should migrate away from .NET binary serialization as part of a long-term hardening strategy.

Basic information

Type: reviewed
Severity: critical
Advisory on GitHub: Open advisory ↗
Repository advisory: —
Source code: Browse source ↗
Published (advisory): 2025-10-16 09:30:24 UTC
Updated: 2025-11-05 20:49:06 UTC
GitHub reviewed: 2025-10-16 21:05:01 UTC
NVD published: 2025-10-16

Score	Percentile
1.03%	77.25%

CVSS Scores

Base score	Version	Severity	Vector
9.8	3.1	—	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type	Value
GHSA	GHSA-4mjw-xr5x-prpc ↗
CVE	CVE-2025-54539 ↗

CWEs

CWE id	Name
CWE-502	Deserialization of Untrusted Data

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
nuget	Apache.NMS.AMQP	< 2.4.0	2.4.0	—

Apache ActiveMQ NMS AMQP Client has a Deserialization of Untrusted Data vulnerability