Improper Neutralization of Command Elements in Shell User Group Provider

published 2022-06-15 4 y ago modified 2026-09-08 2 mo ago also BIT-nifi-2022-33140 , EUVD-2022-5975 , GHSA-77hf-23pq-2g7c

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.5%; EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

The optional ShellUserGroupProvider in Apache NiFi 1.10.0 to 1.16.2 and Apache NiFi Registry 0.6.0 to 1.16.2 does not neutralize arguments for group resolution commands, allowing injection of operating system commands on Linux and macOS platforms. The ShellUserGroupProvider is not included in the default configuration. Command injection requires ShellUserGroupProvider to be one of the enabled User Group Providers in the Authorizers configuration. Command injection also requires an authenticated user with elevated privileges. Apache NiFi requires an authenticated user with authorization to modify access policies in order to execute the command. Apache NiFi Registry requires an authenticated user with authorization to read user groups in order to execute the command. The resolution removes command formatting based on user-provided arguments.

Patch / fix

fixed in 2

maven org.apache.nifi.registry:nifi-registry-core 1.16.3
maven org.apache.nifi:nifi 1.16.3

Exploit prediction

3.52% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
GitHub	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.0	AV:N/AC:M/Au:S/C:P/I:P/A:P
OSV	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.apache.nifi.registry:nifi-registry-core	>=0.6.0, <1.16.3	1.16.3
maven	org.apache.nifi:nifi	>=1.10.0, <1.16.3	1.16.3
bitnami	nifi	>=1.10.0, <=1.16.2	no fix listed

Affected products

Apache Software Foundation Apache NiFi
Apache Software Foundation Apache NiFi Registry

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

lists.apache.org /thread/bzs2pcdjsdrh5039oslmfr9mbs9qqdhr
web, mailing-list, vendor-advisory, advisory
nifi.apache.org /security.html#CVE-2022-33140
web, issue-tracking, vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2022-33140
advisory, web
github.com /apache/nifi
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary