CVE-2023-37599: An issue in issabel-pbx v.4.0.0-6 allows a remote attacker to obtain sensitive information via the modules dir

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2023-37599 is a high-severity flaw (CVSS 7.5) affecting pbx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in issabel-pbx v.4.0.0-6 allows a remote attacker to obtain sensitive information via the modules directory

Why this priority

High 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.6% (top 10%)
CISA exploited list	No
Weakness	CWE-668
Published	2023-07-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: issabel

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

Am I affected?

Timeline

2023-07-13 22:15 UTCPublished CVE record published
2026-06-17 06:08 UTCUpdated Record last modified

issabel pbx DOWNGRADE

Affected: 4.0.0-6

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0-6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0.0-6 (Debian / Ubuntu)

apt-cache madison pbx sudo apt install pbx=<VERSION_BEFORE_4.0.0-6> sudo apt-mark hold pbx

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

dnf --showduplicates list pbx sudo dnf downgrade pbx-<VERSION_BEFORE_4.0.0-6> sudo dnf versionlock add pbx

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.

Nuclei scan template: Issabel PBX 4.0.0-6 - Directory Listing

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-2023-37599?

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

Is CVE-2023-37599 being exploited?

CVE-2023-37599 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-2023-37599 affect?

CVE-2023-37599 affects pbx. Severity is high (CVSS 7.5). An issue in issabel-pbx v.4.0.0-6 allows a remote attacker to obtain sensitive information via the modules directory

How urgent is CVE-2023-37599?

Priority 59/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-0986 MEDIUM 4.7 DOWNGRADE A vulnerability was found in Issabel PBX 4.0.0
CVE-2023-37598 MEDIUM 4.5 DOWNGRADE A Cross Site Request Forgery (CSRF) vulnerability in issabel-pbx v.4.0.0-6 allows a remote attacker to cause a
CVE-2023-37597 HIGH 8.1 DOWNGRADE Cross Site Request Forgery (CSRF) vulnerability in issabel-pbx v.4.0.0-6 allows a remote attacker to cause a d
CVE-2023-37596 HIGH 8.1 DOWNGRADE Cross Site Request Forgery (CSRF) vulnerability in issabel-pbx v.4.0.0-6 allows a remote attacker to cause a d
CVE-2023-37191 MEDIUM 4.8 DOWNGRADE A stored cross-site scripting (XSS) vulnerability in Issabel issabel-pbx v.4.0.0-6 allows attackers to execute

References

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