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WordPress Blackhole for Bad Bots plugin <= 3.8 - Unauthenticated Stored Cross-Site Scripting via User-Agent HTTP Header vulnerability

🗓️ 30 Mar 2026 13:03:17Reported by Huynh Pham Thanh LucType 
patchstack
 patchstack
🔗 patchstack.com👁 9 Views

Unauthenticated stored XSS via User-Agent header in WordPress Blackhole for Bad Bots plugin up to version 3.8.

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30 Mar 2026 13:03Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.2
EPSS0.00315
SSVC
9