BrightSign Digital Signage Diagnostic Web Server 8.2.26 Unauthenticated SSRF
Priority HIGH 70CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01119 66th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| BrightSign | BrightSign Digital Signage Diagnostic Web Server | up to 8.2.26 | — | No fix listed | CNA |
- BrightSign Digital Signage Diagnostic Web Server VendorBrightSign Affected up to 8.2.26 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-36884
- 2026-10-03 Alias added: GHSA-86rv-3v3v-xmw6
References
Exploit 1
Advisory 1
More BrightSign vulnerabilities
- TI-2017-12984 The BrightSign Digital Signage (4k242) device (Firmware 6.2.63 and below) has directory… CVSS 3.0CRITICAL 9.8
- TI-2017-12983 The BrightSign Digital Signage (4k242) device (Firmware 6.2.63 and below) allows renaming… CVSS 3.0HIGH 7.5
- TI-2025-34518 BrightSign Players Use of Default Credentials CVSS 4.0HIGH 8.6
- TI-2025-03471 BrightSign Players Execution with Unnecessary Privileges CVSS 4.0HIGH 8.5
- TI-2017-12982 The BrightSign Digital Signage (4k242) device (Firmware 6.2.63 and below) has XSS via the… CVSS 3.0MEDIUM 6.1
Sources
- CVE-2020-36884 · CVE Program
- CVE-2020-36884 · NVD
- FIRST EPSS
- GHSA-86rv-3v3v-xmw6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences