CVE-2023-49954: The CRM Integration in 3CX before 18.0.9.23 and 20 before 20.0.0.1494 allows SQL Injection via a first name, s

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CRITICAL 9.8REMOTEUPGRADE

CVE-2023-49954 is a critical-severity flaw (CVSS 9.8) affecting 3cx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The CRM Integration in 3CX before 18.0.9.23 and 20 before 20.0.0.1494 allows SQL Injection via a first name, search string, or email address.

Why this priority

Critical severity
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	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-89
Published	2023-12-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 3cx

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

Am I affected?

Timeline

2023-12-25 08:15 UTCPublished CVE record published
2026-06-17 06:36 UTCUpdated Record last modified

3cx 3cx UPGRADE

Affected: < 18.0.9.23 · >= 20.0 and < 20.0.0.1494

Fixed in: 18.0.9.23, 20.0.0.1494

Safe to downgrade to: a release before 20.0

1. Check installed version

apt-cache policy 3cx || rpm -q 3cx || 3cx --version

2. UPGRADE to 18.0.9.23 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade 3cx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade 3cx

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 20.0 (Debian / Ubuntu)

apt-cache madison 3cx sudo apt install 3cx=<VERSION_BEFORE_20.0> sudo apt-mark hold 3cx

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

dnf --showduplicates list 3cx sudo dnf downgrade 3cx-<VERSION_BEFORE_20.0> sudo dnf versionlock add 3cx

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-2023-49954?

3cx: upgrade to 18.0.9.23, 20.0.0.1494. Exact commands for each OS are on this page.

Is CVE-2023-49954 being exploited?

CVE-2023-49954 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-2023-49954 affect?

CVE-2023-49954 affects 3cx. Severity is critical (CVSS 9.8). The CRM Integration in 3CX before 18.0.9.23 and 20 before 20.0.0.1494 allows SQL Injection via a first name, search string, or email address.

How urgent is CVE-2023-49954?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-27362 HIGH 7.8 UPGRADE 3CX Uncontrolled Search Path Local Privilege Escalation Vulnerability
CVE-2022-48483 HIGH 7.5 UPGRADE 3CX before 18 Hotfix 1 build 18.0.3.461 on Windows allows unauthenticated remote attackers to read %WINDIR%\sy
CVE-2022-48482 HIGH 7.5 UPGRADE 3CX before 18 Update 2 Security Hotfix build 18.0.2.315 on Windows allows unauthenticated remote attackers to

References

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