CVE-2016-1142: Seeds acmailer before 3.8.21 and 3.9.x before 3.9.15 Beta allows remote authenticated users to execute arbitra

This month

CRITICAL 9.1UPGRADE

CVE-2016-1142 is a critical-severity flaw (CVSS 9.1) affecting acmailer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Seeds acmailer before 3.8.21 and 3.9.x before 3.9.15 Beta allows remote authenticated users to execute arbitrary OS commands via unspecified vectors.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-78
Published	2016-01-16
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: seeds

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

Am I affected?

Timeline

2016-01-16 05:59 UTCPublished CVE record published
2026-06-17 00:41 UTCUpdated Record last modified

seeds acmailer UPGRADE

Affected: >= 3.8.0 and < 3.8.21 · 3.9.0 beta · 3.9.1 beta · 3.9.2 beta · 3.9.3 beta · 3.9.4 beta · 3.9.5 beta · 3.9.6 beta

Fixed in: 3.8.21

Safe to downgrade to: a release before 3.8.0

1. Check installed version

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

2. UPGRADE to 3.8.21 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade acmailer

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 3.8.0 (Debian / Ubuntu)

apt-cache madison acmailer sudo apt install acmailer=<VERSION_BEFORE_3.8.0> sudo apt-mark hold acmailer

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

dnf --showduplicates list acmailer sudo dnf downgrade acmailer-<VERSION_BEFORE_3.8.0> sudo dnf versionlock add acmailer

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-2016-1142?

acmailer: upgrade to 3.8.21. Exact commands for each OS are on this page.

Is CVE-2016-1142 being exploited?

CVE-2016-1142 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-2016-1142 affect?

CVE-2016-1142 affects acmailer. Severity is critical (CVSS 9.1). Seeds acmailer before 3.8.21 and 3.9.x before 3.9.15 Beta allows remote authenticated users to execute arbitrary OS commands via unspecified vectors.

How urgent is CVE-2016-1142?

Priority 53/100. Critical severity

Related CVEs

CVE-2021-20618 CRITICAL 9.8 UPGRADE UPGRADE Privilege chaining vulnerability in acmailer ver
CVE-2021-20617 CRITICAL 9.8 UPGRADE UPGRADE Improper access control vulnerability in acmailer ver
CVE-2015-2971 MEDIUM 5.5 UPGRADE Directory traversal vulnerability in Seeds acmailer before 3.8.18 and 3.9.x before 3.9.12 Beta allows remote a
CVE-2014-3896 MEDIUM 6.8 UPGRADE Multiple cross-site request forgery (CSRF) vulnerabilities in CGI programs in Seeds acmailer before 3.8.17 and

References

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