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Basecamp: Link unfurling calls out to arbitrary URLs and the private-network guard misses link-local addresses

🗓️ 01 Dec 2025 01:23:14Reported by brumbelowType 
hackerone
 hackerone
🔗 hackerone.com👁 8 Views

Authenticated users can specify a link for metadata; link-local addresses bypass guard, enabling SSRF.

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22 Dec 2025 17:43Current
6.7Medium risk
Vulners AI Score6.7
8