CyberRota Analysis
AI-GeneratedThe vulnerability affects Nezha 2.2.3, specifically in the OAuth2 redirect endpoint, where an empty dashboard_host setting allows for Host header injection. This flaw can enable an attacker to redirect a victim's OAuth2 authorization code to a malicious URL, potentially leading to account takeover. Organizations using this version of Nezha should prioritize immediate remediation, especially if they have not configured the dashboard_host setting.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Nezha 2.2.3 contains a Host header injection regression in the OAuth2 redirect endpoint. When the new optional dashboard_host setting is empty, /api/v1/oauth2/{provider} (cmd/dashboard/controller/oauth2.go) reflects the attacker-supplied HTTP Host header into the redirect_uri sent to the identity provider instead of falling back to the configured install_host. An attacker who induces a victim to begin OAuth2 login via a request that reaches Nezha with a forged Host header can cause an attacker-controlled callback URL to be used as the redirect_uri; if the OAuth2 provider accepts it, the victim's authorization code is delivered to the attacker origin, allowing the attacker to complete the OAuth2 login/binding flow and take over the account. This regresses the fix for GHSA-9rc6-8cjv-rcvx and is configuration-dependent (dashboard_host empty). At the time of the advisory no patched version was available.