What is CVE-2022-28055?

CVE-2022-28055 is a critical-severity vulnerability in Fusionpbx, classified under OS Command Injection. CVSS score: 9.8/10. Published 2022-05-04.

How severe is CVE-2022-28055?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Fusionpbx

CVE-2022-28055

Fusionpbx v4.4 and below contains a command injection vulnerability via the download email logs function.

Vulnerability class: Command Injection (OS Command Injection)

Published 2022-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000

Affected products

Fusionpbx

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

github.com/fusionpbx/fusionpbx/commit/4e260b170e17705c4c9ccf787be7711b63a40868 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-28055?: CVE-2022-28055 is a critical-severity vulnerability in Fusionpbx, classified under OS Command Injection. CVSS score: 9.8/10. Published 2022-05-04.
How severe is CVE-2022-28055?: Critical severity. CVSS v3 base score is 9.8 out of 10.