CVE-2018-15668: An issue was discovered in Bloop Airmail 3 3.5.9 for macOS

Routine

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2018-15668 is a medium-severity flaw (CVSS 5.3) affecting airmail 3. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Bloop Airmail 3 3.5.9 for macOS. The "send" command in the airmail:// URL scheme allows an external application to send arbitrary emails from an active account. URL parameters for the "send" command with the "attachment_" prefix designate attachment parameters. If the value of an attachment parameter corresponds to an accessible file path, the file is attached to the outbound message. In addition, relative file paths ar

Why this priority

Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-200
Published	2018-08-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bloop

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

Am I affected?

Timeline

2018-08-21 23:29 UTCPublished CVE record published
2026-06-17 01:42 UTCUpdated Record last modified

bloop airmail 3 DOWNGRADE

Affected: 3.5.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.9

1. Check installed version

apt-cache policy airmail-3 || rpm -q airmail-3 || airmail-3 --version

2. No fixed release: DOWNGRADE to a release before 3.5.9 (Debian / Ubuntu)

apt-cache madison airmail-3 sudo apt install airmail-3=<VERSION_BEFORE_3.5.9> sudo apt-mark hold airmail-3

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list airmail-3 sudo dnf downgrade airmail-3-<VERSION_BEFORE_3.5.9> sudo dnf versionlock add airmail-3

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-2018-15668?

airmail 3: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-15668 being exploited?

CVE-2018-15668 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-2018-15668 affect?

CVE-2018-15668 affects airmail 3. Severity is medium (CVSS 5.3). An issue was discovered in Bloop Airmail 3 3.5.9 for macOS. The "send" command in the airmail:// URL scheme allows an external application to send arbitrary emails from an active account. URL parameters for the "send" command with the "atta

How urgent is CVE-2018-15668?

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

Software pages

macOS vulnerabilities

Related CVEs

CVE-2018-15669 MEDIUM 5.3 DOWNGRADE An issue was discovered in Bloop Airmail 3 3.5.9 for macOS

References

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