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Koa Vulnerable to Open Redirect via Trailing Double-Slash (//) in back Redirect Logic

🗓️ 21 Oct 2025 15:09:06Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 5 Views

Koa back redirect can force external sites via protocol relative Referer, bypassing origin checks.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl
CVE-2025-62595
21 Oct 202506:58
circl
CNNVD
koa 输入验证错误漏洞
21 Oct 202500:00
cnnvd
CVE
CVE-2025-54420
1 Jan 197600:00
cve
CVE
CVE-2025-62595
21 Oct 202516:20
cve
Cvelist
CVE-2025-54420
1 Jan 197600:00
cvelist
Cvelist
CVE-2025-62595 Koa Vulnerable to Open Redirect via Trailing Double-Slash (//) in back Redirect Logic
21 Oct 202516:20
cvelist
EUVD
EUVD-2025-22567
3 Oct 202520:07
euvd
EUVD
EUVD-2025-23005
3 Oct 202520:07
euvd
EUVD
EUVD-2025-35182
21 Oct 202516:20
euvd
Github Security Blog
Koa Open Redirect via Referrer Header (User-Controlled)
29 Jul 202519:11
github
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Vulners
Node
koajskoaRange2.16.22.16.3npm
OR
koajskoaRange3.0.13.0.3npm

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21 Jan 2026 16:15Current
4.6Medium risk
Vulners AI Score4.6
CVSS 3.14.3 - 6.1
EPSS0.00018
SSVC
5