CVE-2018-18084: An issue was discovered in DuomiCMS 3.0

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-18084 is a critical-severity flaw (CVSS 9.8) affecting duomicms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in DuomiCMS 3.0. SQL injection exists in the ajax.php file, as demonstrated by the uid parameter.

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	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-89
Published	2018-10-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: comsenz

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

Am I affected?

Timeline

2018-10-09 18:29 UTCPublished CVE record published
2026-06-17 01:46 UTCUpdated Record last modified

comsenz duomicms DOWNGRADE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison duomicms sudo apt install duomicms=<VERSION_BEFORE_3.0> sudo apt-mark hold duomicms

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

dnf --showduplicates list duomicms sudo dnf downgrade duomicms-<VERSION_BEFORE_3.0> sudo dnf versionlock add duomicms

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-2018-18084?

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

Is CVE-2018-18084 being exploited?

CVE-2018-18084 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-2018-18084 affect?

CVE-2018-18084 affects duomicms. Severity is critical (CVSS 9.8). An issue was discovered in DuomiCMS 3.0. SQL injection exists in the ajax.php file, as demonstrated by the uid parameter.

How urgent is CVE-2018-18084?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-18083 CRITICAL 9.8 DOWNGRADE An issue was discovered in DuomiCMS 3.0

References

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