CVE-2018-6398: SQL Injection exists in the CP Event Calendar 3.0.1 component for Joomla! via the id parameter in a task=load

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-6398 is a critical-severity flaw (CVSS 9.8) affecting event calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL Injection exists in the CP Event Calendar 3.0.1 component for Joomla! via the id parameter in a task=load action.

Why this priority

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

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-89
Published	2018-01-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: joomlacalendars

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

Am I affected?

Timeline

2018-01-30 15:29 UTCPublished CVE record published
2026-06-17 02:01 UTCUpdated Record last modified

joomlacalendars event calendar DOWNGRADE

Affected: 3.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.1

1. Check installed version

apt-cache policy event-calendar || rpm -q event-calendar || event-calendar --version

2. No fixed release: DOWNGRADE to a release before 3.0.1 (Debian / Ubuntu)

apt-cache madison event-calendar sudo apt install event-calendar=<VERSION_BEFORE_3.0.1> sudo apt-mark hold event-calendar

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

dnf --showduplicates list event-calendar sudo dnf downgrade event-calendar-<VERSION_BEFORE_3.0.1> sudo dnf versionlock add event-calendar

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Joomla! Component CP Event Calendar 3.0.1 - 'id' SQL Injection

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-2018-6398?

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

Is CVE-2018-6398 being exploited?

CVE-2018-6398 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-2018-6398 affect?

CVE-2018-6398 affects event calendar. Severity is critical (CVSS 9.8). SQL Injection exists in the CP Event Calendar 3.0.1 component for Joomla! via the id parameter in a task=load action.

How urgent is CVE-2018-6398?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Joomla vulnerabilities

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References

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