Foreman versions before 2.3.4 and before 2.4.0 is affected by an improper authorization handling flaw.

published 2021-06-03 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26791

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits: 0; none known

Foreman versions before 2.3.4 and before 2.4.0 is affected by an improper authorization handling flaw. An authenticated attacker can impersonate the foreman-proxy if product enable the Puppet Certificate authority (CA) to sign certificate requests that have subject alternative names (SANs). Foreman do not enable SANs by default and `allow-authorization-extensions` is set to `false` unless user change `/etc/puppetlabs/puppetserver/conf.d/ca.conf` configuration explicitly.

Patch / fix

fixed in 1

theforeman foreman 2.3.4

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-3469 updated 2025-11-21 cvss 4.2

Foreman: Impersonation vulnerability in Foreman

Red Hat Satellite 6 foreman, foreman-cli, foreman-ec2, foreman-gce, foreman-ovirt, foreman-vmware, +9 more
not affected: vulnerable code not present “To mitigate the flaw, users are advised to set `allow-authorization-extensions` to the `false` in `/etc/puppetlabs/puppetserver/conf.d/ca.conf` configuration file.”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

n/a Foreman

Classification

Weakness

CWE-863 Incorrect Authorization

References

bugzilla.redhat.com /show_bug.cgi?id=1943630
issue-tracking, mitigation, third-party-advisory

Sources

CVE List CVE-2021-3469
NVD CVE-2021-3469

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