CyberRota Analysis
AI-GeneratedThe vulnerability affects Firefly III's webhook URL validator, which improperly handles requests to loopback addresses (127.0.0.0/8) and allows authenticated users to configure webhooks that can target internal services. Additionally, the validator's reliance on DNS resolution can be exploited by attackers using DNS rebinding techniques, enabling them to bypass validation and send requests to private IP addresses. Organizations using Firefly III, especially those with webhooks enabled, should prioritize addressing this vulnerability to mitigate potential server-side request forgery (SSRF) risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Firefly III's webhook URL validator (IsValidWebhookUrl.php) filters most private/reserved IPv4 ranges but contains an explicit early-return that allows any resolved address in 127.0.0.0/8, permitting an authenticated user (with webhooks enabled, which is off by default) to configure a webhook targeting loopback services on the server.