CVE-2020-12714: An issue was discovered in CipherMail Community Gateway Virtual Appliances and Professional/Enterprise Gateway

This week

MEDIUM 5.9REMOTEUPGRADEUPGRADE

CVE-2020-12714 is a medium-severity flaw (CVSS 5.9) affecting gateway, webmail messenger. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in CipherMail Community Gateway Virtual Appliances and Professional/Enterprise Gateway Virtual Appliances versions 1.0.1 through 4.7.1-0 and CipherMail Webmail Messenger Virtual Appliances 1.1.1 through 3.1.1-0. A Diffie-Hellman parameter of insufficient size could allow man-in-the-middle compromise of communications between CipherMail products and external SMTP clients.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-326
Published	2020-06-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ciphermail

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

Am I affected?

Timeline

2020-06-11 02:15 UTCPublished CVE record published
2026-06-17 02:52 UTCUpdated Record last modified

ciphermail gateway UPGRADE

Affected: >= 1.0.1 and <= 4.7.1-0

Fixed in: newer than 4.7.1-0

Safe to downgrade to: a release before 1.0.1

1. Check installed version

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

2. UPGRADE to newer than 4.7.1-0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gateway

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 1.0.1 (Debian / Ubuntu)

apt-cache madison gateway sudo apt install gateway=<VERSION_BEFORE_1.0.1> sudo apt-mark hold gateway

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

dnf --showduplicates list gateway sudo dnf downgrade gateway-<VERSION_BEFORE_1.0.1> sudo dnf versionlock add gateway

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.

ciphermail webmail messenger UPGRADE

Affected: >= 1.1.1 and <= 3.1.1-0

Fixed in: newer than 3.1.1-0

Safe to downgrade to: a release before 1.1.1

1. Check installed version

apt-cache policy webmail-messenger || rpm -q webmail-messenger || webmail-messenger --version

2. UPGRADE to newer than 3.1.1-0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade webmail-messenger

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade webmail-messenger

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 1.1.1 (Debian / Ubuntu)

apt-cache madison webmail-messenger sudo apt install webmail-messenger=<VERSION_BEFORE_1.1.1> sudo apt-mark hold webmail-messenger

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

dnf --showduplicates list webmail-messenger sudo dnf downgrade webmail-messenger-<VERSION_BEFORE_1.1.1> sudo dnf versionlock add webmail-messenger

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-2020-12714?

gateway: upgrade to newer than 4.7.1-0; webmail messenger: upgrade to newer than 3.1.1-0. Exact commands for each OS are on this page.

Is CVE-2020-12714 being exploited?

CVE-2020-12714 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-2020-12714 affect?

CVE-2020-12714 affects gateway, webmail messenger. Severity is medium (CVSS 5.9). An issue was discovered in CipherMail Community Gateway Virtual Appliances and Professional/Enterprise Gateway Virtual Appliances versions 1.0.1 through 4.7.1-0 and CipherMail Webmail Messenger Virtual Appliances 1.1.1 through 3.1.1-0. A Di

How urgent is CVE-2020-12714?

Priority 46/100. Public exploit reference; Remotely exploitable, no login, no user action

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References

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