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Advisories
Rob--W / cors-anywhere Misconfigured CORS Proxy Allows SSRF
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severity
critical
date
September 25, 2025
Affecting
cors-anywhere all versions
CVE
CVE-2020-36851
CVE type
Permissive Cross-domain Policy with Untrusted Domains, Server-Side Request Forgery (SSRF)
CVSS
9.5
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H
References
Pentester Disclosure
GitHub Issue 152 (Vulnerability Report)
GitHub Issue 78 (Mitigation)
Credit
CertiK's Pentesting Team, Jonathan Leitschuh