CVE-2021-41590: In Gradle Enterprise through 2021.3, probing of the server-side network environment can occur via an SMTP conf

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2021-41590 is a medium-severity flaw (CVSS 5.3) affecting enterprise. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Gradle Enterprise through 2021.3, probing of the server-side network environment can occur via an SMTP configuration test. The installation configuration user interface available to administrators allows testing the configured SMTP server settings. This test function can be used to identify the listening TCP ports available to the server, revealing information about the internal network environment.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Published	2021-10-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gradle

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

Am I affected?

Timeline

2021-10-27 14:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

gradle enterprise UPGRADE

Affected: >= 2020.4 and < 2021.3

Fixed in: 2021.3

Safe to downgrade to: a release before 2020.4

1. Check installed version

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

2. UPGRADE to 2021.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade enterprise

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2020.4 (Debian / Ubuntu)

apt-cache madison enterprise sudo apt install enterprise=<VERSION_BEFORE_2020.4> sudo apt-mark hold enterprise

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list enterprise sudo dnf downgrade enterprise-<VERSION_BEFORE_2020.4> sudo dnf versionlock add enterprise

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-41590?

enterprise: upgrade to 2021.3. Exact commands for each OS are on this page.

Is CVE-2021-41590 being exploited?

CVE-2021-41590 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-2021-41590 affect?

CVE-2021-41590 affects enterprise. Severity is medium (CVSS 5.3). In Gradle Enterprise through 2021.3, probing of the server-side network environment can occur via an SMTP configuration test. The installation configuration user interface available to administrators allows testing the configured SMTP serve

How urgent is CVE-2021-41590?

Priority 38/100. Remotely exploitable, no login, no user action

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CVE-2022-41575 HIGH 7.5 UPGRADE A credential-exposure vulnerability in the support-bundle mechanism in Gradle Enterprise 2022.3 through 2022.3
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CVE-2022-27919 CRITICAL 9.8 UPGRADE Gradle Enterprise before 2022.1 allows remote code execution if the installation process did not specify an in
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References

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