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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.

PUBLISHED Reserved 2025-12-09 | Published 2025-12-10 | Updated 2025-12-11 | Assigner VulnCheck




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

Problem types

CWE-918: Server-Side Request Forgery (SSRF)

Product status

Default status
unaffected

Any version
affected

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab finder

References

www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5595.php exploit

www.exploit-db.com/exploits/48843 exploit

www.exploit-db.com/exploits/48843 (ExploitDB-48843) exploit

www.brightsign.biz (BrightSign Homepage) product

www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5595.php (Zero Science Lab Disclosure) third-party-advisory

github.com/zeroscience (Zero Science GitHub Repository) issue-tracking

www.vulncheck.com/...gnostic-web-server-unauthenticated-ssrf (VulnCheck Advisory: BrightSign Digital Signage Diagnostic Web Server 8.2.26 Unauthenticated SSRF) third-party-advisory

cve.org (CVE-2020-36884)

nvd.nist.gov (CVE-2020-36884)

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