What is CVE-2021-43403?

CVE-2021-43403 is a medium-severity vulnerability in Fusionpbx. CVSS score: 6.5/10. Published 2022-09-29.

How severe is CVE-2021-43403?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Fusionpbx

CVE-2021-43403

An issue was discovered in FusionPBX before 4.5.30. The log_viewer.php Log View page allows an authenticated user to choose an arbitrary filename for download (i.e., not necessarily freeswitch.log in the intended directory).

Published 2022-09-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Fusionpbx

References

github.com/fusionpbx/fusionpbx/commit/57b7bf0d6b67bda07d550b07d984a44755510d9c (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43403?: CVE-2021-43403 is a medium-severity vulnerability in Fusionpbx. CVSS score: 6.5/10. Published 2022-09-29.
How severe is CVE-2021-43403?: Medium severity. CVSS v3 base score is 6.5 out of 10.