CVE-2020-36884: Brightsign, Llc Brightsign Digital Signage Diagnostic Web Server

Medium severity, CVSS 6.9. EPSS: 1.1% chance of exploitation in the next 30 days.

BrightSign Digital Signage Diagnostic Web Server 8.2.26 and less contains an unauthenticated server-side request forgery vulnerability in the 'url' GET parameter of the Download Speed Test service. Attackers can specify external domains to bypass firewalls and perform network enumeration by forcing the application to make arbitrary HTTP requests to internal network hosts.

Affected products

• Brightsign, Llc Brightsign Digital Signage Diagnostic Web Server: up to and including 8.2.26

Published 2025-12-10. Last modified 2026-06-17.