CVE-2025-29953

Apache ActiveMQ NMS OpenWire Client: deserialization allowlist bypass

Description

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.10%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache ActiveMQ NMS OpenWire Client
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread/vc1sj9y3056d3kkhcvrs9fyw5w8kpmlx mailing list vendor advisory
http://www.openwall.com/lists/oss-security/2025/04/18/3 mailing list third party advisory

Frequently Asked Questions

What is the severity of CVE-2025-29953?
CVE-2025-29953 has been scored as a critical severity vulnerability.
How to fix CVE-2025-29953?
To fix CVE-2025-29953, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-29953 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-29953 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-29953?
CVE-2025-29953 affects Apache Software Foundation Apache ActiveMQ NMS OpenWire Client.
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