CVE-2020-36884Public exploitNetwork attack vector

Unauthenticated network enumeration via unvalidated speedtest URL

Published Dec 10, 2025 · Updated Dec 10, 2025

Server-side request forgery in BrightSign Diagnostic Web Server 8.2.26 and earlier allows remote attackers to probe internal network services. The Download Speed Test endpoint passes its unvalidated url GET parameter to an outbound HTTP request, allowing an arbitrary destination host. The endpoint is reachable without authentication when local DWS access is exposed, enabling service enumeration behind the player's network boundary.

CVSS severity6.9
Medium
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in BrightSign Diagnostic Web Server 8.2.26 and earlier allows remote attackers to probe internal network services. The Download Speed Test endpoint passes its unvalidated url GET parameter to an outbound HTTP request, allowing an arbitrary destination host. The endpoint is reachable without authentication when local DWS access is exposed, enabling service enumeration behind the player's network boundary.

The record

CVE
CVE-2020-36884
Published
Dec 10, 2025
Updated
Dec 10, 2025
Vendor
BrightSign
Product
BrightSign Diagnostic Web Server
Classifications
CWE-918, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=8.2.26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BrightSign · BrightSign Diagnostic Web Serverversion=0 <=8.2.26

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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