An issue was discovered in FusionPBX before 4.5.30. The fax_extension may have risky characters (it is not constrained to be numeric).
[ { "events": [ { "introduced": "0" }, { "fixed": "4.5.30" } ] }, { "events": [ { "introduced": "0" }, { "fixed": "4.5.30" } ] } ]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43405.json"