CVE-2021-43405 is a high-severity vulnerability affecting FusionPBX versions prior to 4.5.30, stemming from insufficient input validation in the fax_extension field, which allows risky characters. With a CVSS score of 8.8, this flaw enables authenticated attackers to achieve high impact on confidentiality, integrity, and availability. While not listed on the KEV catalog, an authenticated Remote Code Execution (RCE) exploit for FusionPBX 4.5.29 is publicly available on ExploitDB, though there is no evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.5.30CPE matchmatch criteria | cpe:2.3:a:fusionpbx:fusionpbx:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.