CVE-2021-33191
MiNiFi CPP arbitrary script execution is possible on the agent's host machine through the c2 protocol
- Published
- Updated
- Reserved
- Assigned by
- apache
Description
From Apache NiFi MiNiFi C++ version 0.5.0 the c2 protocol implements an "agent-update" command which was designed to patch the application binary. This "patching" command defaults to calling a trusted binary, but might be modified to an arbitrary value through a "c2-update" command. Said command is then executed using the same privileges as the application binary. This was addressed in version 0.10.0
Timeline
ID reserved
By apache
- 3 months later
· 3 months later
Published
- 3 years later
· 3 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 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.0% · top 9.4% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
Apache Software Foundation · Apache NiFi - MiNiFi C++
- affected 0.5.0 – < Apache NiFi - MiNiFi C++*
References (3)
- https://www.openwall.com/lists/oss-security/2021/08/24/1 (opens in a new tab)x_refsource_MISCx_transferred
- [oss-security] 20210824 CVE-2021-33191: Apache NiFi - MiNiFi C++: MiNiFi CPP arbitrary script execution is possible on the agent's host machine through the c2 protocol (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [announce] 20210824 CVE-2021-33191: Apache NiFi - MiNiFi C++: MiNiFi CPP arbitrary script execution is possible on the agent's host machine through the c2 protocol (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)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-33191)Record last updated .