CVE-2023-33759: SpliceCom Maximiser Soft PBX v1.5 and before does not restrict excessive authentication attempts, allowing att

Q: How do I fix CVE-2023-33759?

maximiser soft pbx: upgrade to newer than 1.5. Exact commands for each OS are on this page.

Q: Is CVE-2023-33759 being exploited?

CVE-2023-33759 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-33759 affect?

CVE-2023-33759 affects maximiser soft pbx. Severity is critical (CVSS 9.8). SpliceCom Maximiser Soft PBX v1.5 and before does not restrict excessive authentication attempts, allowing attackers to bypass authentication via a brute force attack.

Q: How urgent is CVE-2023-33759?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-33759 is a critical-severity flaw (CVSS 9.8) affecting maximiser soft pbx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SpliceCom Maximiser Soft PBX v1.5 and before does not restrict excessive authentication attempts, allowing attackers to bypass authentication via a brute force attack.

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	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-307
Published	2024-01-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: splicecom

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

Am I affected?

Timeline

2024-01-25 08:15 UTCPublished CVE record published
2026-06-17 06:02 UTCUpdated Record last modified

splicecom maximiser soft pbx UPGRADE

Affected: <= 1.5

Fixed in: newer than 1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy maximiser-soft-pbx || rpm -q maximiser-soft-pbx || maximiser-soft-pbx --version

2. UPGRADE to newer than 1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade maximiser-soft-pbx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade maximiser-soft-pbx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2023-33759?

maximiser soft pbx: upgrade to newer than 1.5. Exact commands for each OS are on this page.

Is CVE-2023-33759 being exploited?

CVE-2023-33759 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-2023-33759 affect?

CVE-2023-33759 affects maximiser soft pbx. Severity is critical (CVSS 9.8). SpliceCom Maximiser Soft PBX v1.5 and before does not restrict excessive authentication attempts, allowing attackers to bypass authentication via a brute force attack.

How urgent is CVE-2023-33759?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-33760 MEDIUM 5.3 UPGRADE SpliceCom Maximiser Soft PBX v1.5 and before was discovered to utilize a default SSL certificate
CVE-2023-33758 MEDIUM 6.1 UPGRADE Splicecom Maximiser Soft PBX v1.5 and before was discovered to contain a cross-site scripting (XSS) vulnerabil

References

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