CVE-2025-66524: Apache NiFi: Deserialization of Untrusted Data in GetAsanaObject Processor

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-19 · updated 2026-06-17
Weakness: CWE-502

Description

Apache NiFi 1.20.0 through 2.6.0 include the GetAsanaObject Processor, which requires integration with a configurable Distribute Map Cache Client Service for storing and retrieving state information. The GetAsanaObject Processor used generic Java Object serialization and deserialization without filtering. Unfiltered Java object deserialization does not provide protection against crafted state information stored in the cache server configured for GetAsanaObject. Exploitation requires an Apache NiFi system running with the GetAsanaObject Processor, and direct access to the configured cache server. Upgrading to Apache NiFi 2.7.0 is the recommended mitigation, which replaces Java Object serialization with JSON serialization. Removing the GetAsanaObject Processor located in the nifi-asana-processors-nar bundle also prevents exploitation.

Affected products

Apache Software Foundation Apache NiFi: from 1.20.0 before 2.7.0; 2.7.0-rc1, 2.7.0-rc2 — fixed in 2.7.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache NiFi 2.7.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2025-66524 or the next vulnerability affects your stack