CyberRota Analysis
AI-GeneratedThe calendar module of keeper.sh, prior to version 2.18.14, is vulnerable to a server-side request forgery (SSRF) guard bypass, enabling authenticated attackers to exploit DNS rebinding to access private network addresses. This flaw allows attackers to circumvent hostname validation, potentially exposing sensitive internal infrastructure such as cloud instance metadata endpoints. Organizations using this module should prioritize patching to mitigate the risk of unauthorized access to their internal networks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
keeper.sh's calendar module version prior to 2.18.14 contains a server-side request forgery (SSRF) guard bypass vulnerability that allows authenticated attackers to reach private network addresses by exploiting a DNS rebinding attack against the two-phase URL validation and connection flow. The SSRF guard validates a hostname's resolved IP addresses but discards them before the actual HTTP connection is opened, allowing an attacker who controls authoritative DNS to return a public address during validation and a private address during the subsequent independent socket-level DNS resolution, causing the guard to pass while the outbound connection reaches internal infrastructure such as cloud instance metadata endpoints.