CVE-2020-36884

MEDIUM

BrightSign Digital Signage Diagnostic Web Server <8.2.26 - SSRF

Title source: llm

Description

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.

Exploits (1)

exploitdb WORKING POC

by LiquidWorm · textwebappshardware

https://www.exploit-db.com/exploits/48843

View Code ZIP pw:eip

References (5)

[Various Sources] https://www.brightsign.biz

[Third Party Advisory] https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5595.php

[Various Sources] https://github.com/zeroscience

[Exploit, Third Party Advisory] https://www.exploit-db.com/exploits/48843

[Third Party Advisory] https://www.vulncheck.com/advisories/brightsign-digital-signage-diagnostic-web-server-unauthenticated-ssrf

Scores

CVSS v4 6.9

EPSS 0.0008

EPSS Percentile 24.5%

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-918

Status published

Products (1)

BrightSign, LLC/BrightSign Digital Signage Diagnostic Web Server < 8.2.26

Published Dec 10, 2025

Tracked Since Feb 18, 2026