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…
- 7.5HighCVSS base score
- 2.9%Exploitation in 30 daysEPSS · top 13% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By apache
- 7 months later
· 7 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 2.9% · top 13% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
Apache NiFi
- affected Apache NiFi 1.2.0 to 1.11.4
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.apache.nifi:nifiGHSA-rfmp-jvr7-hx78 (opens in a new tab)
References
References3
- https://nifi.apache.org/security#CVE-2020-9491 (opens in a new tab)x_refsource_MISCx_transferred
- [nifi-commits] 20201005 svn commit: r1882253 - /nifi/site/trunk/security.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [nifi-commits] 20201005 [nifi-site] branch main updated: Minor correction for CVE-2020-9491, Jira number from NIFI-7401 to NIFI-7407. (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-0688 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-rfmp-jvr7-hx78 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-9491)Record last updated .