CVE-2022-28218: An issue was discovered in CipherMail Webmail Messenger 1.1.1 through 4.1.4

Routine

MEDIUM 5.5UPGRADE

CVE-2022-28218 is a medium-severity flaw (CVSS 5.5) affecting 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 Webmail Messenger 1.1.1 through 4.1.4. A local attacker could access secret keys (found in a Roundcube configuration file) that are used to protect Webmail user passwords and two-factor authentication (2FA).

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-276
Published	2022-04-26
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

2022-04-26 18:15 UTCPublished CVE record published
2026-06-17 04:38 UTCUpdated Record last modified

ciphermail webmail messenger UPGRADE

Affected: >= 1.1.1 and < 4.2.1

Fixed in: 4.2.1

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 4.2.1 (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-2022-28218?

webmail messenger: upgrade to 4.2.1. Exact commands for each OS are on this page.

Is CVE-2022-28218 being exploited?

CVE-2022-28218 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-2022-28218 affect?

CVE-2022-28218 affects webmail messenger. Severity is medium (CVSS 5.5). An issue was discovered in CipherMail Webmail Messenger 1.1.1 through 4.1.4. A local attacker could access secret keys (found in a Roundcube configuration file) that are used to protect Webmail user passwords and two-factor authentication (

How urgent is CVE-2022-28218?

Priority 23/100. No elevated risk signals yet.

Software pages

Roundcube vulnerabilities

References

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