CVE-2024-24539: FusionPBX before 5.2.0 does not validate a session.

Q: How do I fix CVE-2024-24539?

fusionpbx: upgrade to 5.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2024-24539 being exploited?

CVE-2024-24539 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-2024-24539 affect?

CVE-2024-24539 affects fusionpbx. Severity is medium (CVSS 5.3). FusionPBX before 5.2.0 does not validate a session.

Q: How urgent is CVE-2024-24539?

Priority 35/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2024-24539 is a medium-severity flaw (CVSS 5.3) affecting fusionpbx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FusionPBX before 5.2.0 does not validate a session.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Published	2024-03-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fusionpbx

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

Am I affected?

Timeline

2024-03-18 03:15 UTCPublished CVE record published
2026-06-17 07:14 UTCUpdated Record last modified

fusionpbx fusionpbx UPGRADE

Affected: < 5.2.0

Fixed in: 5.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 5.2.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fusionpbx

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-2024-24539?

fusionpbx: upgrade to 5.2.0. Exact commands for each OS are on this page.

Is CVE-2024-24539 being exploited?

CVE-2024-24539 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-2024-24539 affect?

CVE-2024-24539 affects fusionpbx. Severity is medium (CVSS 5.3). FusionPBX before 5.2.0 does not validate a session.

How urgent is CVE-2024-24539?

Priority 35/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-23387 MEDIUM 4.8 UPGRADE FusionPBX prior to 5.1.0 contains a cross-site scripting vulnerability

References

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