CVE-2020-36884

6.9 mediumEPSS 1.1%

Medium (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.

Severity

CVSS 4.0

6.9 medium

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

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 66% of CVEs (scores of 2026-10-31)
CWE: CWE-918
Published: 2025-12-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://github.com/zeroscience
https://www.brightsign.biz
https://www.exploit-db.com/exploits/48843
https://www.vulncheck.com/advisories/brightsign-digital-signage-diagnostic-web-server-unauthenticated-ssrf
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5595.php

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