How severe is CVE-2023-43336?

CVE-2023-43336 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-43336 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43336?

CVE-2023-43336 affects Sangoma Freepbx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43336?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-43336 published?

CVE-2023-43336 was published on 2023-11-02 and last updated on 2026-07-05.

CVE-2023-43336

CVE-2023-43336 is a high-severity vulnerability in Sangoma Freepbx with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Sangoma Freepbx
Published: 2023-11-02
Last modified: 2026-07-05

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.

Frequently asked questions

What is CVE-2023-43336?: 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.
How severe is CVE-2023-43336?: CVE-2023-43336 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-43336 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43336?: CVE-2023-43336 affects Sangoma Freepbx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43336?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-43336 published?: CVE-2023-43336 was published on 2023-11-02 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*

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