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Post #771 67
🎯 New Report #3393664: SSRF via improper validation after DNS name resolution in the link-preview feature
🔺Severity: High
👽 Reporter: button142857
⭐️ Reputation: 147
🛠 State: resolved
💼 Team: Rocket.Chat
💵 Bounty: null
🕐 Submitted: 2025-10-22
⏰ Disclosed: 2026-06-11 11:52:25
📝 Summary: The link-preview feature in Rocket.Chat version 7.11.0 did not properly validate the IP address after DNS resolution. This allowed an attacker to obtain a domain that pointed to an internal IP address, triggering SSRF and enabling access to internal hosts that would otherwise be unreachable.
📂 Report JSON File: 3393664
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