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CVE-2023-43336

Sangoma Freepbx broken access control

8.8 HIGHPublic exploitEPSS 0.72%
  1. Published2 Nov 2023

Description

Sangoma Technologies FreePBX before cdr 15.0.18, 16.0.40, 15.0.16, and 16.0.17 was discovered to contain an access control issue via a modified parameter value, e.g., changing extension=self to extension=101.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Sangoma Freepbx≥ 16.0.2 < 16.0.17 · ≥ 16.0.2 < 16.0.40 · < 15.0.16 · < 15.0.18

Remediation

Fixed in
Sangoma Freepbx≥ 16.0.17

References

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Frequently asked

Is CVE-2023-43336 being actively exploited?

CVE-2023-43336 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.72%.

How severe is CVE-2023-43336?

CVE-2023-43336 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.72% probability of exploitation.

Which products are affected by CVE-2023-43336?

Affected products include Sangoma Freepbx.

How do I fix CVE-2023-43336?

Upgrade affected software to a fixed version, for example Sangoma Freepbx 16.0.17 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-43336 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.