CVE-2020-36884

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 v4.0

6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS

1.14% chance of exploitation in the next 30 days, 64th percentile

Nuclei

medium · CWE-918

Published

2025-12-10

Updated

2025-12-11

Proof-of-concept exploits (1)

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

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-36884.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2020-36883
• CVE-2020-36885
• CVE-2020-36882
• CVE-2020-36886
• CVE-2020-36881
• CVE-2020-36887