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The CVE-2025-53032 vulnerability in Backdrop CMS 1.32.1 stems from improper validation of the Host HTTP header. The password reset functionality uses the supplied Host header to generate URLs. An attacker can send a crafted password reset request with a manipulated Host header pointing to a domain they control. When the victim clicks the password reset link received via email, they are redirected to the attacker’s malicious server. This allows the attacker to steal the user’s password reset token, potentially leading to account takeover. The vulnerability can also be exploited to inject cookies for the attacker’s domain, facilitating session hijacking if the user is tricked into visiting the malicious domain.
Platform: Backdrop CMS
Version: 1.32.1
Vulnerability: Host Header Injection
Severity: Moderate
date: 2025-11-18
Prediction: Patch 2025-11-25
What Undercode Say:
curl -H "Host: evil.com" http://backdrop-cms-site.com/user/password
// Example vulnerable code concept: using $_SERVER['HTTP_HOST'] directly. $reset_link = "http://" . $_SERVER['HTTP_HOST'] . "/user/reset/";
How Exploit:
Attacker sends poisoned password reset link with fake Host header. Victim clicks the link in their email and is sent to attacker’s server, leaking the reset token.
Protection from this CVE:
Update Backdrop CMS. Sanitize Host header. Use server name configuration.
Impact:
Account takeover. Session hijacking. Phishing attacks.
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Sources:
Reported By: github.com
Extra Source Hub:
Undercode
