CVE-2018-5989: SQL Injection exists in the ccNewsletter 2.x component for Joomla! via the id parameter in a task=removeSubscr

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CRITICAL 9.8REMOTEUPGRADE

CVE-2018-5989 is a critical-severity flaw (CVSS 9.8) affecting ccnewsletter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SQL Injection exists in the ccNewsletter 2.x component for Joomla! via the id parameter in a task=removeSubscriber action, a related issue to CVE-2011-5099.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-89
Published	2018-02-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: chillcreations

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

Am I affected?

Timeline

2018-02-17 07:29 UTCPublished CVE record published
2026-06-17 02:01 UTCUpdated Record last modified

chillcreations ccnewsletter UPGRADE

Affected: >= 2.0.0 and <= 2.2.4

Fixed in: newer than 2.2.4

Safe to downgrade to: a release before 2.0.0

1. Check installed version

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

2. UPGRADE to newer than 2.2.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ccnewsletter

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 2.0.0 (Debian / Ubuntu)

apt-cache madison ccnewsletter sudo apt install ccnewsletter=<VERSION_BEFORE_2.0.0> sudo apt-mark hold ccnewsletter

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

dnf --showduplicates list ccnewsletter sudo dnf downgrade ccnewsletter-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add ccnewsletter

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 ccNewsletter 2.x.x '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-2018-5989?

ccnewsletter: upgrade to newer than 2.2.4. Exact commands for each OS are on this page.

Is CVE-2018-5989 being exploited?

CVE-2018-5989 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-2018-5989 affect?

CVE-2018-5989 affects ccnewsletter. Severity is critical (CVSS 9.8). SQL Injection exists in the ccNewsletter 2.x component for Joomla! via the id parameter in a task=removeSubscriber action, a related issue to CVE-2011-5099.

How urgent is CVE-2018-5989?

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

Software pages

Joomla vulnerabilities

References

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