CVE-2021-45082: An issue was discovered in Cobbler before 3.3.1

Q: How do I fix CVE-2021-45082?

cobbler: upgrade to 3.3.1; factory: mitigate or apply the listed mitigation; backports: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2021-45082 being exploited?

CVE-2021-45082 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-45082 affect?

CVE-2021-45082 affects cobbler, factory, backports. Severity is high (CVSS 7.8). An issue was discovered in Cobbler before 3.3.1. In the templar.py file, the function check_for_invalid_imports can allow Cheetah code to import Python modules via the "#from MODULE import" substring. (Only lines beginning with #import are

Q: How urgent is CVE-2021-45082?

Priority 48/100. High severity; Public exploit reference; On your watchlist

This month

HIGH 7.8WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2021-45082 is a high-severity flaw (CVSS 7.8) affecting cobbler, factory, backports. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Cobbler before 3.3.1. In the templar.py file, the function check_for_invalid_imports can allow Cheetah code to import Python modules via the "#from MODULE import" substring. (Only lines beginning with #import are blocked.)

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-77
Published	2022-02-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cobbler project · fedoraproject · opensuse · suse

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-02-19 00:15 UTCPublished CVE record published
2026-06-17 04:13 UTCUpdated Record last modified

cobbler project cobbler UPGRADE

Affected: < 3.3.1

Fixed in: 3.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cobbler || rpm -q cobbler || cobbler --version

2. UPGRADE to 3.3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cobbler

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cobbler

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

opensuse factory MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy factory || rpm -q factory || factory --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

opensuse backports MITIGATE

Affected: sle-15 sp3 · sle-15 sp4

Fixed in: no fixed release known

Safe to downgrade to: a release before sle-15

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

suse linux enterprise server MITIGATE

Affected: 11 sp3 · 12 · 15 sp2 · 15 sp3

Fixed in: no fixed release known

Safe to downgrade to: a release before 11

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 34 · 35 · 36

Fixed in: no fixed release known

Safe to downgrade to: a release before 34

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-45082?

cobbler: upgrade to 3.3.1; factory: mitigate or apply the listed mitigation; backports: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-45082 being exploited?

CVE-2021-45082 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-45082 affect?

CVE-2021-45082 affects cobbler, factory, backports. Severity is high (CVSS 7.8). An issue was discovered in Cobbler before 3.3.1. In the templar.py file, the function check_for_invalid_imports can allow Cheetah code to import Python modules via the "#from MODULE import" substring. (Only lines beginning with #import are

How urgent is CVE-2021-45082?

Priority 48/100. High severity; Public exploit reference; On your watchlist

Software pages

Python vulnerabilities

Related CVEs

CVE-2022-0860 CRITICAL 9.1 UPGRADE MITIGATE Improper Authorization in GitHub repository cobbler/cobbler prior to 3.3.2.
CVE-2021-45083 HIGH 7.1 UPGRADE MITIGATE An issue was discovered in Cobbler before 3.3.1
CVE-2021-45081 MEDIUM 5.9 UPGRADE An issue was discovered in Cobbler through 3.3.1
CVE-2021-40325 HIGH 7.5 UPGRADE Cobbler before 3.3.0 allows authorization bypass for modification of settings.
CVE-2021-40324 HIGH 7.5 UPGRADE Cobbler before 3.3.0 allows arbitrary file write operations via upload_log_data.

References

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