In FusionPBX up to 4.5.7, the file app\contacts\contact_addresses.php uses an unsanitized "id" variable coming from the URL, which is reflected in HTML, leading to XSS.
Severity
CVSS 3.1
6.1 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)