CVE-2020-36884 BrightSign Digital Signage Diagnostic Web Server 8.2.26 Unauthenticated SSRF
Unauthenticated attackers can force the BrightSign Digital Signage server to make arbitrary HTTP requests, enabling internal network enumeration and firewall bypass.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-36884?
CVE-2020-36884 is a medium-severity server-side request forgery vulnerability in BrightSign, LLC BrightSign Digital Signage Diagnostic Web Server, published on 10 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2020-36884?
How do I fix CVE-2020-36884?
No fix has been published for CVE-2020-36884 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2020-36884 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36884 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-86rv-3v3v-xmw6.