CVE-2025-54539
CriticalCVSS 9.8Exploitation Probability (EPSS)
High risk81th percentile - higher than 81% of all known CVEs
Summary
Deserialization of untrusted data vulnerability in Apache ActiveMQ NMS AMQP Client (all versions up to and including 2.3.0) when establishing connections to untrusted AMQP servers. Malicious servers could exploit unbounded deserialization logic to execute arbitrary code on the client side. The protection mechanism from version 2.1.0 can be bypassed.
Risk Assessment
Clients connecting to untrusted AMQP servers are exposed to remote code execution, potentially leading to client system compromise.
Recommendation
Upgrade to version 2.4.0 or later and migrate away from .NET binary serialization as part of a long-term hardening strategy.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

