CVE-2018-19793: jiacrontab 1.4.5 allows remote attackers to execute arbitrary commands via the crontab/task/edit?addr=localhos

This month

HIGH 7.2DOWNGRADE

CVE-2018-19793 is a high-severity flaw (CVSS 7.2) affecting jiacrontab. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

jiacrontab 1.4.5 allows remote attackers to execute arbitrary commands via the crontab/task/edit?addr=localhost%3a20001 command and args parameters, as demonstrated by command=cat&args=/etc/passwd in the POST data.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Published	2018-12-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jiacrontab project

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

Am I affected?

Timeline

2018-12-03 06:29 UTCPublished CVE record published
2026-06-17 01:49 UTCUpdated Record last modified

jiacrontab project jiacrontab DOWNGRADE

Affected: 1.4.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4.5 (Debian / Ubuntu)

apt-cache madison jiacrontab sudo apt install jiacrontab=<VERSION_BEFORE_1.4.5> sudo apt-mark hold jiacrontab

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

dnf --showduplicates list jiacrontab sudo dnf downgrade jiacrontab-<VERSION_BEFORE_1.4.5> sudo dnf versionlock add jiacrontab

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-2018-19793?

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

Is CVE-2018-19793 being exploited?

CVE-2018-19793 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-2018-19793 affect?

CVE-2018-19793 affects jiacrontab. Severity is high (CVSS 7.2). jiacrontab 1.4.5 allows remote attackers to execute arbitrary commands via the crontab/task/edit?addr=localhost%3a20001 command and args parameters, as demonstrated by command=cat&args=/etc/passwd in the POST data.

How urgent is CVE-2018-19793?

Priority 51/100. High severity; Public exploit reference

References

← Back to latest CVEs