CVE-2025-66524 Apache NiFi: Deserialization of Untrusted Data in GetAsanaObject Processor
Attackers with cache access can execute code via unsafe Java deserialization in the GetAsanaObject processor of Apache NiFi.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-66524?
CVE-2025-66524 is a high-severity unsafe deserialization vulnerability in Apache Nifi, published on 19 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2025-66524?
3 open source packages ship an affected version, including org.apache.nifi:nifi-asana-processors and nifi. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.nifi:nifi-asana-processors Maven | From 1.20.0 | 2.7.0 |
org.apache.nifi:nifi-asana-processors Maven | From 1.20.0 | 2.7.0 |
nifi Bitnami | From 1.20.0 | 2.7.0 |
Products include Apache Nifi.
How do I fix CVE-2025-66524?
Upgrade org.apache.nifi:nifi-asana-processors to 2.7.0 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-66524 being exploited?
There is no known exploitation of CVE-2025-66524 in the wild and no public exploit code.
Other vulnerabilities in Apache Nifi
- CVE-2018-1309 Improper Restriction of XML External Entity Reference in Apache NiFi
- CVE-2017-15697 Apache NiFi XSS issue in context path handling
- CVE-2017-5636 Injection in Apache NiFi
- CVE-2026-68981 Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests
- CVE-2023-36542 Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources
Sources
Also known as BIT-nifi-2025-66524, CLEANSTART-2026-KF29618, CLEANSTART-2026-UW09726, CLEANSTART-2026-WE49283, GHSA-v4p2-2w39-mhrj.