BaseFortify

Publication date: 2025-12-10

Last updated on: 2025-12-11

Assigner: VulnCheck

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.

CVSS Scores

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Meta Information

Published

2025-12-10

Last Modified

2025-12-11

Generated

2026-07-06

AI Q&A

2025-12-10

EPSS Evaluated

2026-07-05

NVD

CVE-2020-36884

Affected Vendors & Products

Vendor	Product	Version / Range
brightsign	digital_signage_diagnostic_web_server	8.2.26

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-918	The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

Executive Summary

This vulnerability is an unauthenticated server-side request forgery (SSRF) in BrightSign Digital Signage Diagnostic Web Server version 8.2.26 and earlier. It occurs in the 'url' GET parameter of the Download Speed Test service, allowing attackers to make the server send arbitrary HTTP requests to external or internal network hosts without authentication.

Impact Analysis

An attacker can exploit this vulnerability to bypass firewalls and perform network enumeration by forcing the application to make HTTP requests to internal network hosts. This can lead to unauthorized access to internal network information and potential further attacks within the network.

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